Remove unneeded javascript:void(0)

Fixes #1199

static/directives/multiselect-dropdown.html

@@ -17,7 +17,7 @@
       </li>
       <li role="presentation" class="divider"></li>
       <li ng-repeat="item in items | filter:filter | limitTo:10">
-        <a class="menu-item" href="javascript:void(0)" ng-click="toggleItem(item)">
+        <a class="menu-item" ng-click="toggleItem(item)">
             <span class="co-checkable-item" ng-class="isChecked(selectedItems, item) ? 'checked': 'not-checked'">
             </span>
             <span class="menu-item-template" ng-transcope></span>
@@ -40,4 +40,4 @@
       </li>
     </ul>
   </div>
-</div>
+</div>