WebUI: Make 'Unlock' option is available only on locked user page
The implementation includes checking password policy for selected user.
'Unlock' option is available only in case user reached a limit of login failures.
Ticket: https://pagure.io/freeipa/issue/5062
Signed-off-by: Serhii Tsymbaliuk <stsymbal@redhat.com>
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>