Fixes issues with Browse Repository from * commands

Renamed to Gutter Changes
Provides local changes if any, or recent commit changes
Distinguishes between added, changed, and removed lines
Shows a hover for the full diff hunk
Shows diff even with unsaved changes

Removes TypeScript workarounds from 3.9.0-beta

Patches issue with TypeScript upgrade

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

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

Fixes recent changes for revision files

Unifies tag parsing to include msg, ref, & dates
Bumps required Git to 2.7.2
Adds more tag sorting options similar to branches

Also adds cancellation and max timeout