@
KevinH, I doubt it's a bug, it's a 'feature' inherent in software that allows
unmodified left button drag-n-drop to move things up and down an unsorted list.
IMO it's too easy to do inadvertently. The best solution would be to make it an optional 'feature' that defaults to
Allow, so that existing behaviour doesn't change. And provide a Move->Up/Down/Top/Bottom context menu flyout for the book browser list along with equivalent user defined keyboard shortcuts.
Added: I avoid the problem by giving focus to the Book browser via the keyboard (Ctrl+Shift+B) and then using arrow keys to move up and down the list, and the Enter key to select.
On the OP's shrinking Book browser panel issue, I suggest a
Lock panel option in the Book browser's title bar context menu:
I do wonder how many users even know that context menu exists. It also pops for right button click on title bars of Preview and Validation, but not the Clips title bar (it has its 'own' context menu).
BR