Update Image Credits (rather than append)

The blue ‘Paste Image Credits’ text on the Title Page of a book is very helpful but really it needs to be used after all images have been inserted in the book. If picture credits are added and then there are changes later, it is first necessary to manually delete all the previous credits before clicking ‘Paste Image Credits’ again (otherwise all the credits are appended to what is already there). It would be even more helpful if there is some way that the when you click ‘Paste Image Credits’ (or something like ‘Update Image Credits’), the current image credits could replace the contents of this text box.

James thanks for the feedback. Because you can put other credits in that box, we don’t think it’s safe to let our code delete things in there. Hope that makes sense.