Added missing $supers call at overwrote method

* As this $supers call was missing the children wasn't added to the parent's children array, it was just inserted at the DOM

FEA: ItEr02S03MigracionZK5

ganttzk/src/main/resources/web/js/ganttz/DependencyList.js

@@ -2,6 +2,8 @@ zk.$package("ganttz");
 
 ganttz.DependencyList = zk.$extends(zk.Widget, {
 	appendChild : function(child){
+		//true for ignoring DOM insertion
+		this.$supers('appendChild',[child,true]);
 		jq('#listdependencies').append(child);
 	}
 });