>and the action menu remains hidden

this is present in 2.20, I wish this report was made a week ago :(

I agree but as I said the behavious cannot be changed and as it is a Nular command alt syntax cannot be added. This means new command and for something trivial like this (all)Dedmen would not be happy

>There is allDead command for this. Isn't that logical?
allDead includes vehicles allDeadMen excludes vehicles. I did not make it, so cannot tell you teh logic, but it was there for too long to change behaviour

No, agents are agents

agents apply {typeof agent _x} // ["Snake_random_F","Snake_random_F","Snake_random_F","Rabbit_F"]

This behaviour was well documented as of 21:50, 5 October 2013 https://community.bistudio.com/wiki/allDeadMen