Merge branch...

Merge branch '495-the-audio-guide-prevents-you-from-entering-numbers-that-are-assigned-to-it' into 'master'

Fix audio guide interferes with text area

Closes #495

See merge request arsnova/frag.jetzt!450

src/app/components/shared/comment-answer/comment-answer.component.html

@@ -17,6 +17,7 @@
         <mat-tab label="{{'comment-page.your-answer' | translate}}">
           <mat-form-field class="input-block">
             <textarea [(ngModel)]="answer" (input)="edit = true"
+                      (keyup)="$event.cancelBubble=true"
                       matInput
                       matTextareaAutosize
                       matAutosizeMinRows="3"