Provide a soft reset / Sync option

[basarat]

There is a lot that user does outside the atom ide (like branch hoping and what not). It would be non feasible to take all these into account.

So provide a soft reset option that basically purges all we know about the file system and starts fresh.

closes:
#272

More reasons: 9f549b1

• Also document it under "Sync" : "out of sync fix"

[basarat]

There is ui button as well:

But I just use the shortcut ctrl+' / cmd+' 🌹

Version

2.15.12