#196 Add "old password" field when changing password

[Andrey Mizernyk]

Add "old password" field to password changing window.
And before changing password server must compare it with
the old one.

[Robert MacGrogan]

Logged In: YES
user_id=258727

I'm not sure how this is useful. You must be logged in to
change your password, so the server has already verified
that you know your old password.