Allow removal of finished date#51

It’d be great when adding a historical record of the books you have completed to be able to remove the finished date from those books! It doesn’t seem required based on import from Goodreads/Storygraph, but I can see a way in the UI to remove it.

I would also like this. Additionally, I’m trying to start tracking comics in the app so I need to mark a lot of volumes as completed, but not only can I not remove the inaccurate completion date, I can’t even edit it to a different date.