Zweibach

It's worth pointing out that dev has stated that he'll create a feature for janitors to create proper tag replace "siblings" server-side in his upcoming network job.

"Do nothing" is already a function in the archive/delete filter, default is up-arrow and something else I think. Similarily backspace is "shit, I messed up, go back and undo".

If both features got implemented I don't see any reason why they wouldn't work together.

This could likely be satisfied by #994

You can already do this pretty easily. Select all tags you want to make a sibling for, even including the planned ideal sibling, and open the sibling manager via "add...

Duplicate of #310