Disabling select actions button

Closes #369

app/partials/im.html

@@ -189,9 +189,9 @@
               </a>
               <a class="im_edit_cancel_link" ng-click="selectedCancel()">Cancel</a>
               <div class="im_edit_selected_actions">
-                <a class="btn btn-primary im_edit_forward_btn" ng-click="selectedForward()">
+                <a class="btn btn-primary im_edit_forward_btn" ng-click="selectedForward()" ng-class="{disabled: !selectedCount}" ng-disabled="!selectedCount">
                   Forward <strong class="im_selected_count" ng-show="selectedCount > 0" ng-bind="selectedCount"></strong>
-                </a><a class="btn btn-danger im_edit_delete_btn" ng-click="selectedDelete()">
+                </a><a class="btn btn-danger im_edit_delete_btn" ng-click="selectedDelete()" ng-class="{disabled: !selectedCount}" ng-disabled="!selectedCount">
                   Delete <strong class="im_selected_count" ng-show="selectedCount > 0" ng-bind="selectedCount"></strong>
                 </a>
               </div>