UI Problem with Drag & Drop and Delete Overlay
If a pagetree uses the size of the browser window, the "delete page" overlay moves over the mouse-pointer position.
So in case an editor clicks the last page in the page tree and moves it for one pixel, the overlay will show up over the selected page - letting go of the mouse button will result in deleting the page.
If DAM is used (which is always the last page in the pagetree) you will delete the MEDIA page with all records attached to it.
A possible solution is to "shorten" the pagetree frame by the height of the overlay.