Add some sort of notification that you have invitations to own a crate #1116
Description
@natboehm implemented the last big chunk of inviting users to be owners rather than just adding them!
Now there's a menu item in the user menu for "Owner invites", which lists pending invitations for you to accept or decline.
@natboehm also had a great idea that we should have some sort of notification that you have invitations to accept... I'm not sure how to do that though!!!