[fix] [minor] set z-index of communication composer autocomplete field

public/js/wn/views/communication.js

@@ -345,6 +345,10 @@ wn.views.CommunicationComposer = Class.extend({
 						}
 					});
 				},
+				open: function(event, ui) {
+					var zindex = cint(me.dialog.$wrapper.css("z-index")) + 1
+					$(this).autocomplete("widget").css("z-index", zindex);
+				},
 				focus: function() {
 					// prevent value inserted on focus
 					return false;