Currently the "page pointer" page-select-popup-window always expands the first website in the list.
But if you have multiple websites it would make more sense if the block/page you are editing should decide which website tree that should be expanded.
Example:
You have an installation with three websites, "A", "B", "C". You edit a block in website "C", that block has a page pointer and when you click that a popup is displayed where you should choose page, now the page tree of website "A" is opened (the top one).
Instead - it would make more sense to expand the page tree of website "C" in above example.
Its easy to by mistake pick the wrong page. And timeconsuming to close and open the correct one.