Fixes issue with video mute indicator.

index.html

     <script src="libs/popover.js?v=1"></script><!-- bootstrap tooltip lib -->
     <script src="libs/toastr.js?v=1"></script><!-- notifications lib -->
     <script src="interface_config.js?v=5"></script>
-    <script src="libs/app.bundle.js?v=50"></script>
+    <script src="libs/app.bundle.js?v=51"></script>
     <script src="analytics.js?v=1"></script><!-- google analytics plugin -->
     <link rel="stylesheet" href="css/font.css?v=6"/>
     <link rel="stylesheet" href="css/toastr.css?v=1">

modules/RTC/RTC.js

         }
 
         if(!stream)
-            return false;
+            return true;
 
         if (value != stream.muted) {
             stream.setMute(value);