Feat/closed channels 602

Adding the ability to mark channels open, closed and moderated

Right now this is just a widget that changes the channel mode on the epic.

Login. Go to your channel In the profile section, you should see a dropdown button that allows you to change between open, moderated and closed. Changing this box should persist across reloads.

If you go to another user's channel, that dropdown should be display only and you should not be able to change it unless you are the channel owner the logged in user