- SIM->get_enabled() SIM->set_enabled() were no longer useful, since they   mirrored the use of enable_control_panel exactly.  This should not cause   any change in behavior, and it lets me eliminate these methods which   don't make much sense anymore.
- SIM->get_enabled() SIM->set_enabled() were no longer useful, since they
  mirrored the use of enable_control_panel exactly.  This should not cause
  any change in behavior, and it lets me eliminate these methods which
  don't make much sense anymore.

marmolejo/bochs-zet,marmolejo/bochs-zet,marmolejo/bochs-zet,marmolejo/bochs-zet,marmolejo/bochs-zet