[Mobile] IN PROGRESS: Overlay and form cleanups

open #74
Widths and layout strategy fixed for label and
controls in form when appearing in mobile;
Overlay margins adjusted;
Cleaned up font size, line-height in tree items;

platform/commonUI/general/res/sass/_constants.scss

@@ -47,6 +47,7 @@ $colorPausedBg: #c56f01;
 $colorPausedFg: #fff;
 $colorCreateBtn: $colorKey;
 $colorGridLines: rgba(#fff, 0.05);
+$colorFormLines: rgba(#fff, 0.1);
 // Menu colors
 $colorMenuBg: lighten($colorBodyBg, 23%);
 $colorMenuFg: lighten($colorMenuBg, 70%);