overrides weren't detected by should not sleep, i think i've mostly
fixed that with SpaceManiac/SpacemanDMM#214
Some of these are wacky but overall this pr is harmless
signals shouldnt sleep even in weird 1 in a million situations or due
to other people adding bad code
overrides of changeling can_sting() use alert() and input() and that's
just too fucked for me to fix in this pr