QmlDesigner.anchors: avoid recursion

Since instances are asynchronius now, we cannot
rely on instance feedback (for e.g. fill).

This beautification code has to be rewritten using the model.

Reviewed-by: Kai Koehne

src/plugins/qmldesigner/designercore/model/qmlanchors.cpp

@@ -136,7 +136,7 @@ bool QmlAnchors::isValid() const
 
 void QmlAnchors::beautify()
 {
-
+    return;
     if ((instanceHasAnchor(AnchorLine::Left) &&
          instanceHasAnchor(AnchorLine::Right) &&
          instanceHasAnchor(AnchorLine::Top) &&