Removed &nav reference.

firmware/application/apps/ble_tx_app.cpp

@@ -336,12 +336,12 @@ BLETxView::BLETxView(NavigationView& nav)
         random_mac = v;
     };
 
-    button_open.on_select = [this, &nav](Button&) {
-        auto open_view = nav.push<FileLoadView>(".TXT");
-        open_view->on_changed = [this, &nav](std::filesystem::path new_file_path) {
+    button_open.on_select = [this](Button&) {
+        auto open_view = nav_.push<FileLoadView>(".TXT");
+        open_view->on_changed = [this](std::filesystem::path new_file_path) {
             on_file_changed(new_file_path);
 
-            nav.set_on_pop([this]() { button_play.focus(); });
+            nav_.set_on_pop([this]() { button_play.focus(); });
         };
     };