Option to group communities

I would love to be able to group communities. Maybe I'm too much of a joiner, but it would be useful for me to have communities organized in groups along the left side of the page, where there is currently a list of every single community I've joined. Right now I can only see the first 11 communities, then I have to drop to the bottom and click the arrow to see all communities. Having folders for groups of related communities would keep everything better organized.