Add Bulk Edit Functionality for Book Metadata

[MiguelAntonioRS]

Editing metadata must currently be done one book at a time. For users with large collections, this is inefficient.

Allow users to select multiple books and edit shared metadata fields such as: 
 

Adding/removing tags
Updating authors
Changing genres or series information
Modifying publication year or rating

Include an undo option or confirmation dialog before applying bulk changes.

[acx10]

This feature has been implemented in v0.29!

[MiguelAntonioRS]

Oh ok thank you my bad