Allow the user to organize local branches into folders/groups

Currently, the repositories can be grouped under custom groups, much like placing files into separate folders.

I would like to propose that you implement the same feature for local branches. Another variant could be to allow the tagging of branches. I don't mean the git tagging, I mean assigning custom labels to a branch and the providing a quick way to filter the branches by one or more selected tags. Either way works for me, but probably I would prefer the folder approach.

The reason for this is that I have lots of local branches that correspond to issues I've been working on throughout time. It becomes harder to figure out where some branches are at, especially when I have to switch context. I would like to
create a group called "Done" or "Implemented" and move the branches to this group after they are done to get rid of the visual clutter.

There were some previous suggestions on these lines under Branches view, though they are not exactly the same as my request.