webui: Set 'SOA serial' field as read-only
On the WebUI, the SOA serial textbox must be disabled (non-editable)
to prevent the 'ValidationError' message to be shown when this
specific field is manually set.
Fixes: https://pagure.io/freeipa/issue/9249
Signed-off-by: Carla Martinez <carlmart@redhat.com>
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Rafael Guterres Jeffman <rjeffman@redhat.com>