Stop following when project is unshared (#4010)

Before this change the views would continue to update in the background
of the "disconnected" dialogue, which was disconcerting.

[[PR Description]]

Release Notes:

- Fixed an edge-case where following didn't handle unshare correctly
43183538a7Conrad Irwin committed on 1/11/2024, 6:26:56 PM· committed by GitHubparents51cc6b1f418bd9
5 files changedLine totals unavailable