On ppc64le it looks like this test is often failing because it
takes a second or two to update the partition list after we
click update settings, but we're not waiting for that, so we
wind up clicking in the wrong place because we match the next
partition needle before the list is refreshed but click after
it's refreshed. Let's hope these waits solve it.
Signed-off-by: Adam Williamson <awilliam@redhat.com>