is finished, which reduces unnecessary delay.
This also means that it's possible to have, say, an Extra stage screen with
a long, complicated graphic, without having to make every screen delay
that long before prepping.
(It's currently not possible to have different switch delays for each type; eg.
Stage 1 prepping in 1 second and switching in 3, and Extra prepping in 3
seconds and switching in 5; the switch time is constant, based on m_In.
This would be useful in the longer-complicated-extra-stage case.)