Add option to add special "Uncategorized" profile

**Is your feature request related to a usage problem (not a bug)? Please describe.**
I wish to use profiles to sort my subscriptions, however I am always frustrated when i am not able to tell which channel has been subscribed to in a profile vs which is only visible in the "All Channels" profile

**Describe the solution you'd like to see implemented**
I would like the option to add a special "Uncategorized" profile, perhaps toggled through settings, that would show subscriptions that are only subscribed to in the "All Channels" profile, so that i can easily know which has not been sorted into a specific profile as yet

**Describe alternatives you've considered**
I am not sure there is an alternative. If you can think of one, I'd love to hear it.

**Screenshots**
Not really applicable here as yet

**Additional context**
Cant think of anything