[Mobile] IN PROGRESS: Menu hide/show fixes; font-size tweaking

open #74
Changed .right-repr to use translateX in phone portrait mode;
font-size tweaking;
Refactored css organization in mobile/_layout.scss;

platform/commonUI/general/res/sass/user-environ/_object-browse.scss

@@ -21,6 +21,7 @@
  *****************************************************************************/
 .object-browse-bar {
     @include absPosDefault();
+    @include box-sizing(border-box);
     height: $ueTopBarH;
     line-height: $ueTopBarH;
     white-space: nowrap;