feat(webui): Add dashboard filter.

- Convert Object properties to and array for backends and frondends for each providers.
- Remove unused parameters.
- Add filter.

webui/src/app/sections/providers/frontend-monitor/frontend-monitor.directive.js

@@ -8,8 +8,7 @@ function frontendMonitor() {
     controllerAs: 'frontendCtrl',
     bindToController: true,
     scope: {
-      frontend: '=',
-      frontendId: '='
+      frontend: '='
     }
   };
 }