Make all repls Private/Public for Core

Describe your feature request
I would like a new tab(s) in the tab thing (Look at the image provided) that says ‘Public Repls’ and/or ‘Private Repls’, for Core members/anyone who has the private repls.

I would also like an option to make a repls private/select some repls and the option to make them all private/all public depending on which ‘tab’ your in.

What problem(s) would this feature solve?
For example, if someone just paid for Core plan, they can make all existing repls private with the press of a button.