Avoid putting usability into its own scope.

static/js/controllers/roomchangecontroller.js

@@ -58,7 +58,8 @@ define([], function() {
             ctrl.enabled = false;
         });
 
-        if (typeof $scope.roomdata !== "undefined") {
+        var roomDataLinkInput = $element.find(".roomdata-link-input");
+        if (roomDataLinkInput.length) {
             $scope.roomdata = {};
             $timeout(function() {
                 if (ctrl.enabled) {

static/js/directives/usability.js

@@ -26,8 +26,6 @@ define(['jquery', 'underscore', 'text!partials/usability.html'], function($, _,
 
     var controller = ['$scope', "mediaStream", "safeApply", "$timeout", function($scope, mediaStream, safeApply, $timeout) {
 
-      $scope.roomdata = {};
-
       var pending = true;
       var complete = false;
 
@@ -106,7 +104,6 @@ define(['jquery', 'underscore', 'text!partials/usability.html'], function($, _,
     }];
 
     return {
-      scope: true,
       restrict: 'E',
       replace: true,
       template: template,

static/partials/usability.html

@@ -14,13 +14,13 @@
             <p><i>{{_("This is your room link:")}}</i></p>
             <p>
               <div class="input-group input-group-lg">
-                <input type="text" class="form-control" ng-model="roomdata.link" placeholder="{{_('Creating room link ...')}}" disabled>
+                <input type="text" class="form-control roomdata-link-input" ng-model="roomdata.link" placeholder="{{_('Creating room link ...')}}" disabled>
                 <span class="input-group-btn">
                   <button class="btn btn-primary" type="button" ng-disabled="!roomdata.link" ng-click="changeRoomToId(roomdata.name)">{{_("Start")}}</button>
                 </span>
               </div>
             </p>
-            <p><i>{{_("Just click start")}}</i></p>            
+            <p><i>{{_("Just click start")}}</i></p>
             <small>
               <ul class="fa-ul">
                 <li><i class="fa-li fa fa-share-square"></i>{{_("Share this URL with the people you want to meet.")}}</li>