[Mobile] Sanding of mobile styles, in progress

open #74
CSS and markup changes for mobile,
particularly on grid-item;
Mod to behavior in tree for mobile nav:
leaf node grid-item click now navs to item;
Fixed info-button to work properly with mod to
infoButtonGesture.js;

platform/commonUI/inspect/src/gestures/InfoButtonGesture.js

@@ -68,7 +68,7 @@ define(
             // and then on any body touch the bubble is dismissed
             function showBubble(event) {
                 trackPosition(event);
-                
+                event.stopPropagation();
                 // Show the bubble, but on any touchstart on the
                 // body (anywhere) call hidebubble
                 dismissBubble = infoService.display(