[Mobile] Clean-Up

Cleaned the unused code for the
backArrow and long touch gestures.
Commented out functions for later use
Currently shows the back arrow, however,
only will print to console on press.
Edited tests where mobile checks were breaking
and fixed.

platform/commonUI/browse/res/templates/back-arrow.html

@@ -20,6 +20,7 @@
  at runtime from the About dialog for additional information.
 -->
 
+<!-- Back Arrow Icon used on mobile-->
 <span ng-controller="BrowseController"
       ng-click="backArrow()">
     <a class='icon ui-symbol mobile-back-arrow'>&lt;</a>