update password

[532910]

Similar to a new password generation #61 it'd be nice to have an ability to update current passwords.

There is pass-update helper, but I'm not sure it's suitable for this issue.

[maximbaz]

Agreed - #61 also covers edit and delete functionality, and I do envision a password generation functionality, so I think this will be covered by #61 🙂

Lets get this form done first and then see if it needs to be improved, e.g. by keeping the previous password somewhere visible