Fixes getWorkingUri to ensure file exists (and deal with deleted files)
Fixes rev_parse__show_toplevel to deal with paths that don't exist

Optimizes fs watcher for repo file changes
 - Ignores gitignored files
 - Only updates the nodes required

Uses the default remote only
Changes to settings per usage

This was a bad fix -- the issue wasn't special characters at all 😖

Changes openRevision to use left diff

Moves current user to the top of the contributors marked w/ (you) suffix
Adds a max timeout to live share presence requests (250ms)
Only requests the presence of the current user in the contributors view