moveoff: clarify pin names for other use cases

moveoff.comp is targeted as a Hal-only offset while paused facility,
however, the component could be used for other applications not
requiring a pause, so clarify naming of the controlling input pin:
  was: is-paused
   is: apply-offsets

The ancillary scripts, moveoff_gui and hookup_moveoff.tcl, use
the revised naming but otherwise focus on the while-paused
application

Signed-off-by: Dewey Garrett <dgarrett@panix.com>