[Mobile] IN PROGRESS: Styling in forms, overlay and tree

open #74
.section-header and form-row styles changed in forms/_elems.scss;
significant changes to overlay in mobile: full-screen, close button, more;
tree hover bg changed to use rgba(#fff, 0.1);
removed "Hide title by default" in core/bundle.json;

platform/commonUI/general/res/sass/tree/_tree.scss

@@ -132,7 +132,7 @@ ul.tree {
                 // NOTE: [Mobile] Removed Hover on Mobile
                 @include desktop {
                     &:hover {
-                        background: lighten($colorBodyBg, 5%);
+                        background: rgba(#fff, 0.1); //lighten($colorBodyBg, 5%);
                         color: lighten($colorBodyFg, 20%);
                         .context-trigger {
                             display: block;