Navigation Editor: Move locations modal state into ManageLocations component

[Mamaduka]

What problem does this address?

Currently, the modal state is managed by the main useNavigationEditor hook. I don't think there's a need for this now.

What is your proposed solution?

Move modal state to ManageLocations component and manage it locally.

[getdave]

I don't think there's a need for this now.

Could you expand on this a little bit? What makes you feel there is no longer a need?

[Mamaduka]

Sorry, I should've used a different sentence here. I don't know why this was done initially, but there's no need to manage modal state in useNavigationEditor.