[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/sass/_hide-non-functional.scss

@@ -36,7 +36,7 @@
 			// Don't pad in from top and bottom
 			//top: 0; bottom: 0;
 			.object-browse-bar {
-				.t-btn.key-window {
+				.btn.key-window {
 					// Hide the Open in New Window button
 					display: none;
 				}