Ignore chat, but not encrypted keys

Sometimes I want to stop listening to the chat for a while, but don't want to miss people trying to talk on keys. So the idea is to allow keys to still come through. It could be all encrypted keys, or it could just be the ones you've added to your chip. Or maybe encrypted keys have their own toggle.

The goal would be to let people turn off pub chat and still listen to important keys, like work ones.

I never use ignore chat because I do not want to miss key chatter, this solves that.