create_database: fix password comparison when creating a safe
We (err, I :-)) previously removed the database_manager.set_password_check() function which was only used to be able to compare 2 passwords. I removed all of its users ... but one ... as it turns out. All credit goes to @msandova for finding this oversight.
This is a minimally invasive fix and this MR ports the fix for master to our stable 4.x branch.
Fixes: https://gitlab.gnome.org/World/PasswordSafe/-/issues/290