Improve move pages error and progress messages

Sometimes, when you try to move pages, the error messages are too generic and don't tell you what prevented you from moving the pages.

Sometimes, the move can occur but will still bring you back to the UI t move page with an error, which can lead the user to think it didn't happen.

Also, in the event we are moving a large number of pages, it would be interesting to have a progress bar or any indication of how it is going, like the PDF export, and understand if it is really finished or is still working/having delay.