There was a bunch of conditionally compiled code on mobile
that had special hiding/unhiding rules.
Try to unify that with the desktop code by introducing a
"simplified" flag. This certainly breaks and will have to
be finetuned. In particular, I can't test CCR dives, which
are treated specially on mobile.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>