RB: allow setting momentum and stopping movement completely
RB: allow setting momentum and stopping movement completely

zenmumbler/stardazed-tx,stardazed/stardazed-tx,stardazed/stardazed-tx,zenmumbler/stardazed-tx,stardazed/stardazed,zenmumbler/libzm,zenmumbler/libzm,stardazed/stardazed-tx,zenmumbler/libzm,zenmumbler/stardazed-tx,zenmumbler/libzm,stardazed/stardazed,zenmumbler/stardazed-tx