diff --git a/.gitignore b/.gitignore
index 9485e1fe2..921068d4a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,3 +34,34 @@ package-lock.json
 
 # Ignore generated public directory from `winter:mirror public`
 public
+composer.json
+plugins/winter/debugbar/.gitignore
+plugins/winter/debugbar/icon.png
+plugins/winter/debugbar/LICENSE
+plugins/winter/debugbar/Plugin.php
+plugins/winter/debugbar/README.md
+plugins/winter/debugbar/assets/css/debugbar.css
+plugins/winter/debugbar/assets/less/debugbar.less
+plugins/winter/debugbar/assets/less/vendor.less
+plugins/winter/debugbar/classes/JavascriptRenderer.php
+plugins/winter/debugbar/classes/ServiceProvider.php
+plugins/winter/debugbar/classes/WinterDebugbar.php
+plugins/winter/debugbar/collectors/BackendCollector.php
+plugins/winter/debugbar/collectors/CmsCollector.php
+plugins/winter/debugbar/collectors/ComponentsCollector.php
+plugins/winter/debugbar/collectors/ModelsCollector.php
+plugins/winter/debugbar/config/config.php
+plugins/winter/debugbar/lang/en/lang.php
+plugins/winter/debugbar/lang/ru/lang.php
+plugins/winter/debugbar/lang/sl/lang.php
+plugins/winter/debugbar/middleware/InjectDebugbar.php
+plugins/winter/debugbar/middleware/InterpretsAjaxExceptions.php
+plugins/winter/debugbar/screenshots/collapsed.png
+plugins/winter/debugbar/screenshots/expanded-queries.png
+plugins/winter/debugbar/screenshots/expanded-timeline.png
+plugins/winter/debugbar/twig/extension/Debug.php
+plugins/winter/debugbar/twig/extension/Dump.php
+plugins/winter/debugbar/twig/extension/Stopwatch.php
+plugins/winter/debugbar/twig/node/StopwatchNode.php
+plugins/winter/debugbar/twig/tokenparser/StopwatchTokenParser.php
+plugins/winter/debugbar/updates/version.yaml
diff --git a/modules/system/controllers/EventLogs.php b/modules/system/controllers/EventLogs.php
index 5c870e54d..c0ee5f06e 100644
--- a/modules/system/controllers/EventLogs.php
+++ b/modules/system/controllers/EventLogs.php
@@ -1,12 +1,13 @@
 <?php namespace System\Controllers;
 
 use App;
-use Lang;
-use Flash;
-use BackendMenu;
 use Backend\Classes\Controller;
+use Backend\Facades\BackendMenu;
+use Illuminate\Support\Facades\Lang;
+use Illuminate\Support\Str;
 use System\Classes\SettingsManager;
 use System\Models\EventLog;
+use Winter\Storm\Support\Facades\Flash;
 
 /**
  * Event Logs controller
@@ -45,6 +46,122 @@ public function index_onRefresh()
         return $this->listRefresh();
     }
 
+    /**
+     * Show a popup to ask user his choices about clearing the log
+     */
+    public function index_onClearLog()
+    {
+        $config = $this->makeConfig([
+            'fields' => [
+                'message' => [
+                    'type' => 'text',
+                    'label' => 'system::lang.event_log.delete_filtered_search',
+                    'comment' => 'system::lang.event_log.delete_filtered_search_comment',
+                    'span' => 'full',
+                ],
+                'date_start' => [
+                    'type' => 'datepicker',
+                    'label' => 'system::lang.event_log.delete_filtered_date_start',
+                    'span' => 'left',
+                    'mode' => 'datetime',
+                ],
+                'date_end' => [
+                    'type' => 'datepicker',
+                    'label' => 'system::lang.event_log.delete_filtered_date_end',
+                    'span' => 'right',
+                    'mode' => 'datetime',
+                ],
+            ],
+        ]);
+        $config->model = new EventLog;
+
+        $formWidget = $this->makeWidget('Backend\Widgets\Form', $config);
+        $formWidget->bindToController();
+
+        return $this->makePartial('delete_filtered_form', [
+            'formWidget' => $formWidget,
+        ]);
+    }
+
+    /**
+     * Return informations about the log to be cleared
+     */
+    public function index_onClearLogInfos()
+    {
+        $message = post('message');
+        $dateStart = post('date_start');
+        $dateEnd = post('date_end');
+
+        if (!$message && !$dateStart && !$dateEnd) {
+            return [
+                '#deleteFilteredList' => '',
+                '#deleteFilteredResults' => '',
+            ];
+        }
+
+        $events = EventLog
+            ::when($message, fn ($q) => $q->where('message', 'like', '%' . str_replace(
+                ['\\', '%', '_'],
+                ['\\\\', '\\%', '\\_'],
+                $message
+            ) . '%'))
+            ->when($dateStart, fn ($q) => $q->where('created_at', '>=', $dateStart))
+            ->when($dateEnd, fn ($q) => $q->where('created_at', '<=', $dateEnd))
+            ->orderBy('created_at', 'desc')
+            ->get();
+
+        $config = $this->makeConfig('~/modules/system/models/eventlog/columns.yaml');
+        $config->model = new EventLog;
+
+        $controlList = $this->makeWidget('Backend\Widgets\Lists', $config);
+        $controlList->bindEvent('list.extendRecords', function ($records) use ($events, $message) {
+            if ($events->count() > 0) {
+                return $events;
+            }
+            return collect([]);
+        });
+
+        $controlList->bindToController();
+
+        return [
+            'total' => $events->count(),
+            '#deleteFilteredList' => $controlList->render(),
+            '#deleteFilteredResults' => Lang::get('system::lang.event_log.delete_filtered_results', [
+                'what' => mb_strtolower(Str::plural(Lang::get('system::lang.event_log.preview_title'), $events->count())),
+                'count' => $events->count(),
+            ])
+        ];
+    }
+
+    /**
+     * Delete the filtered events log
+     */
+    public function index_onClearLogDelete()
+    {
+        $message = post('message');
+        $dateStart = post('date_start');
+        $dateEnd = post('date_end');
+        $eventLog = new EventLog;
+
+        $eventLog = EventLog
+            ::when($message, fn ($q) => $q->where('message', 'like', '%' . str_replace(
+                ['\\', '%', '_'],
+                ['\\\\', '\\%', '\\_'],
+                $message
+            ) . '%'))
+            ->when($dateStart, fn ($q) => $q->where('created_at', '>=', $dateStart))
+            ->when($dateEnd, fn ($q) => $q->where('created_at', '<=', $dateEnd));
+
+        $events = $eventLog->get();
+        $eventLog->delete();
+
+        Flash::success(Lang::get('system::lang.event_log.delete_filtered_success', [
+            'what' => mb_strtolower(Str::plural(Lang::get('system::lang.event_log.preview_title'), $events->count())),
+            'count' => $events->count(),
+        ]));
+        return $this->listRefresh();
+    }
+
     public function index_onEmptyLog()
     {
         EventLog::truncate();
diff --git a/modules/system/controllers/eventlogs/_delete_filtered_form.php b/modules/system/controllers/eventlogs/_delete_filtered_form.php
new file mode 100644
index 000000000..9015a2ce7
--- /dev/null
+++ b/modules/system/controllers/eventlogs/_delete_filtered_form.php
@@ -0,0 +1,118 @@
+<div id="deleteFilteredPopup">
+    <?= Form::open(['id' => 'deleteFiltered']) ?>
+        <div class="modal-header">
+            <button type="button" class="close" data-dismiss="popup">&times;</button>
+            <h4 class="modal-title"><?= e(trans('system::lang.event_log.delete_filtered_link')) ?></h4>
+        </div>
+
+        <div class="modal-body clearfix">
+            <?php if ($this->fatalError): ?>
+                <p class="flash-message static error"><?= e($fatalError) ?></p>
+            <?php endif ?>
+
+            <?= $formWidget->render(); ?>
+
+            <div class="loading-indicator-container">
+                <div class="loading-indicator hidden">
+                    <span></span>
+                    <div><?= e(trans('system::lang.event_log.delete_filtered_loading')) ?></div>
+                </div>
+
+                <div id="deleteFilteredResults" class="form-group span-full"></div>
+                <div id="deleteFilteredList" class="form-group span-full"></div>
+            </div>
+
+        </div>
+
+        <div class="modal-footer">
+            <button
+                type="button"
+                class="btn btn-default"
+                data-dismiss="popup">
+                <?= e(trans('backend::lang.form.cancel')) ?>
+            </button>
+
+            <button
+                data-name="submit"
+                class="btn btn-success hidden"
+                data-request="onClearLogDelete"
+                data-request-confirm="<?= e(trans('system::lang.event_log.delete_filtered_confirm')) ?>"
+                data-request-success="$(this).trigger('close.oc.popup');"
+                data-stripe-load-indicator>
+                <?= e(trans('system::lang.event_log.delete_filtered_link')) ?>
+            </button>
+        </div>
+
+    <?= Form::close() ?>
+</div>
+
+<script>
+    $('#deleteFilteredPopup').on('popupComplete', function() {
+
+        var $loadingIndicator = $('#deleteFilteredPopup .loading-indicator-container .loading-indicator');
+        var $resultsInfos = $('#deleteFilteredResults');
+        var $resultsList = $('#deleteFilteredList');
+
+        var $inputMessage = $('#deleteFiltered :input[name="message"]');
+        $inputMessage.defaultValue = $inputMessage.val();
+
+        function refreshResults () {
+            showLoadingIndicator();
+
+            Snowboard.request('#deleteFiltered', 'onClearLogInfos', {
+                success: (data) => {
+                    const total = data.total;
+
+                    if (total > 0) {
+                        $('#deleteFiltered button[data-name="submit"]').removeClass('hidden');
+                    } else {
+                        $('#deleteFiltered button[data-name="submit"]').addClass('hidden');
+                    }
+
+                    hideLoadingIndicator();
+                },
+                error: (data) => {
+                    hideLoadingIndicator()
+                },
+            });
+        };
+
+        function showLoadingIndicator () {
+            $loadingIndicator.removeClass('hidden');
+            $resultsInfos.addClass('hidden');
+            $resultsList.addClass('hidden');
+        }
+
+        function hideLoadingIndicator () {
+            $loadingIndicator.addClass('hidden');
+            $resultsInfos.removeClass('hidden');
+            $resultsList.removeClass('hidden');
+        }
+
+        function delay(callback, ms) {
+            var timer = 0;
+            return function() {
+                var context = this, args = arguments;
+                clearTimeout(timer);
+                timer = setTimeout(function () {
+                    callback.apply(context, args);
+                }, ms || 0);
+            };
+        }
+
+        // Monitor change on message field
+        $inputMessage.keyup(delay(function (e) {
+            if (e.target.value != e.target.defaultValue) {
+                e.target.defaultValue = this.value;
+                refreshResults();
+            }
+        }, 750));
+
+        // Monitor change on datepicker fields
+        $('#deleteFiltered').on('change.oc.formwidget', '.field-datepicker', delay(function (e) {
+            if (e.target.name != 'message') {
+                refreshResults();
+            }
+        }, 400));
+    })
+</script>
diff --git a/modules/system/controllers/eventlogs/_list_toolbar.php b/modules/system/controllers/eventlogs/_list_toolbar.php
index 4dd78a55c..3b0ee3628 100644
--- a/modules/system/controllers/eventlogs/_list_toolbar.php
+++ b/modules/system/controllers/eventlogs/_list_toolbar.php
@@ -6,6 +6,15 @@
         class="btn btn-primary wn-icon-refresh">
         <?= e(trans('backend::lang.list.refresh')) ?>
     </a>
+    <a
+        href="javascript:;"
+        data-handler="onClearLog"
+        data-control="popup"
+        data-size="huge"
+        data-attach-loading
+        class="btn btn-default wn-icon-filter-circle-xmark">
+        <?= e(trans('system::lang.event_log.delete_filtered_link')) ?>
+    </a>
     <a
         href="javascript:;"
         data-request="onEmptyLog"
diff --git a/modules/system/lang/en/lang.php b/modules/system/lang/en/lang.php
index 8c5eb3001..9eb8859db 100644
--- a/modules/system/lang/en/lang.php
+++ b/modules/system/lang/en/lang.php
@@ -398,6 +398,15 @@
         'message' => 'Message',
         'level' => 'Level',
         'preview_title' => 'Event',
+        'delete_filtered_confirm' => 'Delete the filtered events?',
+        'delete_filtered_date_start' => 'Starting date',
+        'delete_filtered_date_end' => 'Ending date',
+        'delete_filtered_link' => 'Delete filtered events',
+        'delete_filtered_loading' => 'Search for events matching your criteria',
+        'delete_filtered_search' => 'Messages containing',
+        'delete_filtered_success' => ':count :what successfully deleted',
+        'delete_filtered_search_comment' => 'select all event log messages containing the following text',
+        'delete_filtered_results' => '<b>:count</b> :what matching your criteria',
     ],
     'request_log' => [
         'hint' => 'This log displays a list of browser requests that may require attention. For example, if a visitor opens a CMS page that cannot be found, a record is created with the status code 404.',
diff --git a/modules/system/lang/fr/lang.php b/modules/system/lang/fr/lang.php
index 57a25e478..de24d2110 100644
--- a/modules/system/lang/fr/lang.php
+++ b/modules/system/lang/fr/lang.php
@@ -352,6 +352,15 @@
         'message' => 'Message',
         'level' => 'Niveau',
         'preview_title' => 'Évènement',
+        'delete_filtered_confirm' => 'Supprimer les évènement filtrés?',
+        'delete_filtered_date_start' => 'Depuis le',
+        'delete_filtered_date_end' => 'Jusqu\'au',
+        'delete_filtered_link' => 'Supprimer des évènements',
+        'delete_filtered_loading' => 'Recherche des évènements correspondant à vos critères',
+        'delete_filtered_search' => 'Message contenant',
+        'delete_filtered_success' => ':count :what supprimés avec succès',
+        'delete_filtered_search_comment' => 'sélectionner tous les messages du journal des événements contenant le texte suivant',
+        'delete_filtered_results' => '<b>:count</b> :what correspondant à votre recherche',
     ],
     'request_log' => [
         'hint' => 'Ce journal affiche une liste de requêtes potentiellement suspectes. Par exemple, si un visiteur ouvre une page introuvable du CMS, une ligne avec le code statut 404 est alors créée.',
diff --git a/plugins/hounddd/testbatches b/plugins/hounddd/testbatches
new file mode 160000
index 000000000..2fba53232
--- /dev/null
+++ b/plugins/hounddd/testbatches
@@ -0,0 +1 @@
+Subproject commit 2fba5323263773c47db41a98a463449d8b7dd3d5