Option to unlock folder as user as fallback

[tobiasKaminsky]

• pre-write hook moves file to change to a $file.part (hidden) name to prevent overwriting it & stores meta-data
• if the lock does not get reverted for >=24h the user can see the lock in a new setting page and manually unlock it, with a warning
• if the folder lock is reverted the $file.part is reverted, the corresponding metadata is restored

[tacruc]

This would be a great opportunity. My crypt folder is locked now for 6 hours by a other client. The thing is that I only have one client right now. So I don't think that it is going to be unlocked.

[tobiasKaminsky]

As discussed this should happen automatically after 24h (calculated after last write on a chunk)