Group for otherwise ungrouped channels

[abanksss]

I really like the channel groups feature in the subscription feed, but I have hundreds of channels that I am subbed to so its easy to miss some that should be in a certain group. It would be nice if I could enable a group that automatically pulls all ungrouped channels into it. This way I could just look at it every once in a while to quickly see if any channels are missing a group they should be in.

[Bnyro]

This was added in the latest release, see also #8026.