Remove hidden view via removeView resizing problems

I had some resizing problem after removing a hidden view with removeView from a layout.

I found the calculation difference inside _set_child_size during the correction calculation. _hiddencells was still the old value (before removing) leading to a higher y value.

Yep, this one is a bug.
As quick and dirty solution you can show the view before removing it.

Fix will be included in the next build