SP3: url integrity checking on a delete action: you can update destination field but could not come back to your delete engine on ok...

I activated the url integrity checking.

Then I tried to delete a page which was referenced by another page. This fires an error in the delete engine. From the delete engine I could open the guilty big text field (should be the whole container, cf parent bug). But once on the parent container, I could not come back to my delete engine. This closes all my engines. This should open the destination field pop-up engine in a new pop-up so that the editor comes back afterwards on his delete engine.