webui tests: close notification when revoking cert
When a cert is revoked, a notification is displayed
and may obscure the buttons. Make sure to close the
notification before moving to the next step.
Fixes: https://pagure.io/freeipa/issue/8911
Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
Reviewed-By: Mohammad Rizwan <myusuf@redhat.com>