[Frontend] Fixes to scrolling and layout in Inspector

open #638
In progress;

platform/commonUI/browse/res/templates/browse/object-properties.html

@@ -20,8 +20,7 @@
  at runtime from the About dialog for additional information.
 -->
 <div ng-controller="ObjectInspectorController as controller">
-    <div class="pane-header flex-elem">Inspection</div>
-    <ul class="flex-elem grows vscroll">
+    <ul class="flex-elem grows l-inspector-part">
         <li>
             <em>Properties</em>
             <div class="inspector-properties"