support autostash

[Saafo]

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
when checkout other branches or pull current branch, hope I can use --autostash to avoid manully stash and pop my works in working area.

Describe alternatives you've considered
Tower support autostash when checkout other branches.

Additional context
None.

[stale]

This issue has been automatically marked as stale because it has not had any activity half a year. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.