Frontend] More refining of collapsing treeview

open #90
Create and Search controls now properly change
to mini-tabs when treeview is collapsed;
Mods to .create-btn to use :before for symbol instead of span;
 TO-DO: why does mct-device alter the order of items in the rendered
 markup?

platform/commonUI/general/res/sass/controls/_menus.scss

@@ -43,6 +43,11 @@
 	}
 
 	&.create-btn {
+		&:before {
+			content:'\2b';
+			display: inline;
+			font-family: symbolsfont;
+		}
 		.title-label {
 			font-size: 1rem;
 		}