Change the "remove missing" button to disabled rather than hidden
Change the "remove missing" button to disabled rather than hidden

Also set a minimum size

(cherry picked from commit 0b6326c79aca94a417218160e311a08fb2891953)

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot