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Removes insiders restriction from Open in Remote commands

Adds experimental 'Stash Changes' to stash list
Adds experimental 'Stash Unstaged Changes' to stash list

Adds experimental 'Apply Stashed Changes' command
Adds experimental 'Delete Stashed Changes' to stashed changes quick pick

Renames Show Repository History to Show Current Branch History
Doesn't migrate data yet

Adds branches quick pick

Reworks keyboard context

Adds diff with next command
Fixes #45 - Keyboard Shortcut collision with Project Manager
Preps v2.11.2

Adds context for toggling CodeLens

Splits showQuickCommitDetails into showQuickCommitDetails and showQuickCommitFileDetails
Adds closeUnchangedFiles command
Adds openChangedFiles command
Adds diffDirectory command
Adds contextual description to the `go back` commands
Fixes #44 by adding a warning message about Git version requirements
Fixes intermittent errors when adding active line annotations
Fixes intermittent errors when opening multiple files via quick picks
Updates dependencies
Preps v2.11.0