Code review comment for lp:~andreas-pokorny/mir/add-option-to-disable-acceleration

So it seems none was only intended to indicate that there is no acceleraton filter available. We could remap our enum value to flat and 'speed' zero, or document how to acchieve an unaccelerated setting. I would prefer the second option since it would avoid mapping errors when the current status is read back, and we have to interpret a float value.