setting step to 0 stops select all from working

[napredator]

trafficstars

for release 0.5.0.1

[Gumball2415]

any more details about your build and steps to reproduce? i can't seem to reproduce this bug at the moment (my build is fb82b8bc2984bade55cc3d25c8e0bc76f46cc7a1 at the time of writing)