[Fronted] Minor final sanding and polishing

WTD-839
.t-view-switcher > .view-switcher;
Added CSS transition to hide/show of view-switcher;
Moved .view-switcher hide/show to _frame.scss;
Tweaked .frame:hover to raise z-index to show complete border;

platform/commonUI/general/res/templates/controls/switcher.html

@@ -22,7 +22,7 @@
 <span ng-controller="ViewSwitcherController">
 
     <div
-	    class="t-view-switcher menu-element btn btn-menu dropdown click-invoke"
+	    class="view-switcher menu-element btn btn-menu dropdown click-invoke"
 	    ng-if="view.length > 1"
 	    ng-controller="ClickAwayController as toggle"
 	    >