[Browse] Context menu gesture called

The context menu gesture is called when the user clicks
the arrow next to the title of a domain object. This does
not yet display the context menu. It also does not yet
distinguish between edit and browse mode. #33.

platform/commonUI/general/res/templates/tree-node.html

@@ -27,7 +27,7 @@
 	        >
             <span
 	            class='ui-symbol view-control'
-				ng-click="toggle.toggle(); treeNode.trackExpansion()"
+				ng-click="toggle.toggle(); treeNode.trackExpansion() ; treeNode.contextMenu()"
 				ng-if="model.composition !== undefined"
 				>
                 {{toggle.isActive() ? "v" : ">"}}