Update current/last bookmark in same file

[quindel]

Instead of creating a new bookmark and deleting the old one, is there a way to have rockbox do it automatically? ask me whether I want to update the current/last one, and either update it, or have me select the one to update?

Also the bookmark file in the directory has a listing of bookmarks in files that no longer exist. can that be auto cleaned?

I'm using 3.10.

Thanks.