[KimDaBa] deleting missing images

[Robert Story]

I'd like to request that when deleting multiple missing images, error messages
to to a text list, instead of individual dialogs.

That way, if a director with lots of images (say, 7,000) is deleted outside of
kimdaba, and one finds missing images to delete (without noticing to uncheck
delete from disk), they wouldn't have to click OK 7,000 times!!

ARRRrrrggggghhhhh!!!!