Subfolders Idea (c/p from Twitter)

I don't know if you guys can accept ideas sent on twitter, but I was linked here for suggestions so I'm guessing I should just repost it here.

"Can we have subfolders? I find myself sometimes having to collapse multiple different folders in order to get only the one I want at one time. With subfolders, it'd be easier to organize your servers list. For example a folder for a type of server and a subfolder for whether or not you moderate that server or are active/inactive in it to keep everything more tidy and clean."

An old idea for sure, but most of the suggestions for it seem to be ignored.