The findControls() routine was not finding several of the buttons on my Nimbus+
controller so that I could not configure those buttons in
Settings > Controls > Nimbus+
A, B, X, Y, and the L and R shoulder buttons are detected by the existing code.
The D-pad and the 'start' and 'select' standins are not.
One odd thing that happened the first time I played with this change was that
after configuring the new buttons and loading up a game the buttons seemed to
be initially in a random state and so the game seemed to behave like some
random buttons were held down. After pressing and releasing all the new buttons
the game seemed to behave more normally. I'm not sure of my diagnosis because
it only happened the one time and I didn't have an opportunity to reproduce or
debug whatever happened.
