(Feature request) Bulk-adding attributes

[zadam]

Describe feature

When the user uses Shift+Click to select a bunch of pages in the tree bar, add a right-click option (and maybe keyboard shortcut) that open a dialog for adding owned attributes to all selected pages.

This way I could add the ~template=@paper template attribute en masse.

Additional Information

No response

[zadam]

implemented in master

[agentydragon]

awesome, thanks so much!