Currently we can not list the available remotes, add, rename or remove them.

From the BranchListPopup we should allow opening a popup that provides that functionality.

Mockup of this popup:

┌Remotes─────┐
│origin      │
│foo         │
│..          │   
│Details─────│
│name: origin│
│url: git:...│
└────────────┘
Scroll [↑↓] Fetch [⇧F] Edit [e] Add [a] Remove [r]

Other popups are good ways for inspiration on how to do this e.g SubmodulesListPopup