Some fixups for anaconda_help. Two runs of it failed today around
handoff from the root password screen to the install progress
screen; add a couple of wait_still_screens there to make it
safer. Drop the added nonlive needles, because they're too
permissive, causing problems for other tests (they're matching
before they should); instead we solve the problem of spokes being
highlighted by just pressing shift-tab a few times. And fix some
tabs to be spaces.
Signed-off-by: Adam Williamson <awilliam@redhat.com>