[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/dialog/res/templates/overlay.html

@@ -25,7 +25,7 @@
         <a href=""
            ng-click="ngModel.cancel()"
            ng-if="ngModel.cancel"
-           class="btn normal ui-symbol close">
+           class="clk-icon icon ui-symbol close">
             x
         </a>
         <div class="abs contents" ng-transclude>