user-accounts: Fix password dialog hangs

On Fedora 31, the "Current Password: " prompt is printed by passwd,
when I enter my current password wrongly. It is not clear to me why
and I don't know how to debug the PAM stack, but it causes that the
checkmark for the old password field is not reliable and what is worse
it causes the dialog hangs when it is submitted. Let's add check for
the "urrent" keyword to fix this issue.

Fixes: #766
11 jobs for wip/oholy/password-dialog-hangs in 4 minutes and 44 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #494201
build

00:01:41

 
  Test
passed #494203
asan

00:03:02

passed #494202
test

00:01:36

 
  Manual
manual #494208
allowed to fail manual
armv8
manual #494204
allowed to fail manual
flatpak
manual #494207
allowed to fail manual
msan
manual #494209
allowed to fail manual
ppc64le
manual #494205
allowed to fail manual
tsan
manual #494206
allowed to fail manual
ubsan
 
  Review
manual #494210
allowed to fail manual
review
manual #494211
allowed to fail manual
stop_review