Do not give value to disabled

The presence of "disabled" in a HTML tag
is sufficient to disable it.
Assigning a value has no effect.

src/main/webapp/app/exercise/exercise-card/exercise-card.component.html

@@ -28,7 +28,7 @@
                     </div>
                         <ng-template #helpBookmark> {{ 'exercise.comingSoon' | translate}}</ng-template>
                     <div class="form-check" style="float: right; padding-right: 10px;" [ngbTooltip]="helpBookmark">
-                        <input class="form-check-input" type="checkbox" value="" id="card-defaultCheck1" disabled="true">
+                        <input class="form-check-input" type="checkbox" value="" id="card-defaultCheck1" disabled>
                         <label class="form-check-label" for="card-defaultCheck1"></label>
                     </div>
                 </div> <!-- card bookmark end-->

src/main/webapp/app/exercise/exercise-details/exercise-details.component.html

@@ -72,7 +72,7 @@
                                     </div>
                                     <div class="form-check" style="float: right; padding-right: 10px;" [ngbTooltip]="helpComingSoon" placement="right">
                                         <input class="form-check-input" type="checkbox" value=""
-                                            id="modal-defaultCheck1" disabled="true">
+                                            id="modal-defaultCheck1" disabled>
                                         <label class="form-check-label" for="modal-defaultCheck1"></label>
                                     </div>
                                 </div> <!-- modal bookmark end-->