This was a really useful feature, please bring it back.
I have different notebooks for different themes, and different sets of tags that I use for each notebook. When I click on a notebook, I don't want to scroll down a list of hundreds of tags to find the ones that are relevant to the current notebook. It used to be great when I could right click on the tag tree and choose "hide unassigned tags".
Without this feature, when I'm looking for notes in a notebook I have to remember what tags I've used in that particular notebook to find them in the tag tree. I also have to remember what
