Fixing 'Create Alarm Definition' for IE11

The widget ngTags is used to select dimensions. This widget does not
work with IE 11 and the AngularJS versions provided by Horizon. Replacing
ng-click event with ng-mousedown event, because the ng-click event does
not fire on IE11 in the given dialog layout.

Change-Id: I9918debd164dce7ddc4bba15a07d6f3edddc7a09
Story: 2001504
Task: 6295
(cherry picked from commit 4c2cabb)
(cherry picked from commit cdaf5b3)

Author: cheld

monitoring/static/monitoring/js/ng-tags-input.js

@@ -772,7 +772,7 @@ tagsInput.run(["$templateCache", function($templateCache) {
   );
 
   $templateCache.put('ngTagsInput/auto-complete.html',
-    "<div class=\"autocomplete\" ng-show=\"suggestionList.visible\"><ul class=\"suggestion-list\"><li class=\"suggestion-item\" ng-repeat=\"item in suggestionList.items track by track(item)\" ng-class=\"{selected: item == suggestionList.selected}\" ng-click=\"addSuggestion()\" ng-mouseenter=\"suggestionList.select($index)\" ng-bind-html=\"highlight(item)\"></li></ul></div>"
+    "<div class=\"autocomplete\" ng-show=\"suggestionList.visible\"><ul class=\"suggestion-list\"><li class=\"suggestion-item\" ng-repeat=\"item in suggestionList.items track by track(item)\" ng-class=\"{selected: item == suggestionList.selected}\" ng-mousedown=\"addSuggestion()\" ng-mouseenter=\"suggestionList.select($index)\" ng-bind-html=\"highlight(item)\"></li></ul></div>"
   );
 }]);