Stop rescued kerbals showing up on the crew list

[Tommy59375]

I posted this originally in the Gameplay Discussions Forum, although was directed that this would probably be a better place. [Original Thread Here]

When I rescue kerbals for contracts, they get added to the list of available crew for assignment to missions.  But I don't want this to be happened.  I want them to simply disappear after being rescued.  After all, they're supposed to have been stranded up there by some other company's space program, aren't they?

I have been told that I can simply fire them in the astronaut complex, which is much easier than editing the persistence file which I have been doing.  But I would like to automate the process nonetheless, thus I'm requesting that someone make a mod to do so, or post a mod that has this behaviour.

A complication is that I play KSP 1.0.5 still and will not be updating for the foreseeable future.  As a result, I understand that this may be too much to ask.  Perhaps a 1.1.3 mod may work, if this part of the game hasn't changed across the versions.  But it's obviously understandable that most people would not be willing to mod an older version of the game.

Thank you very much in advance.

Edited July 13, 2016 by Tommy59375