[Frontend] Styling for search elements

#70
Significant .scss and markup changes across search;
New symbols font (v2.2) char for clear icon;
To-do: style "load more" element;

platform/commonUI/browse/res/templates/browse.html

@@ -28,7 +28,9 @@
                 >
                 <mct-representation key="'create-button'" mct-object="navigatedObject">
                 </mct-representation>
-                <div class='holder search-holder abs'>
+                <div class='holder search-holder abs'
+                     ng-class="{active: treeModel.search}"
+	                >
                     <mct-include key="'search'"
                                  mct-object="domainObject"
                                  ng-model="treeModel">