Add hint title to challenge.html (#103)

* Add hint title to UI to support CTFd/CTFd#2699

Author: ColdHeat

templates/challenge.html

@@ -79,7 +79,11 @@ <h3 class="challenge-value text-center">
                     </details>
                     {% else %}
                     <details @toggle="showHint(event)">
+                      {% if hint.title %}
+                      <summary>{{ hint.title }}(Cost: {{ hint.cost }} point{{ hint.cost|pluralize }})</summary>
+                      {% else %}
                       <summary>Unlock Hint for {{ hint.cost }} point{{ hint.cost|pluralize }}</summary>
+                      {% endif %}
                       <div x-html="html"></div>
                     </details>
                     {% endif %}