feature request: password forget timeout

[meoso]

Please consider adding an idle and shutdown password-forget feature.

I'll use the Lastpass plugin as the model: [ ] Automatically forget passwords when all browsers are closed for X minutes. [ ] Automatically forget passwords after X idle minutes.

This is a good solution for those of us who do not wish to repeat our passwords all day long; but still want some level of security once the machine is abandoned for some time.

I consider Gmail-Manager-NG essential. Thank you for the fork!