The current method throw the props, with some impulse, this would add an alternate mode where they're just dropped, without any impulse (so in 0g they'd stay floating where they were in the kerbal's hand).
Why ? : In situations where you're seated and controlling the craft, and using some interactive props (camera, flashlight, etc), it can be quite annoying since they'll eventually be thrown away at the other side of the capsule, so you need to leave your seat and go look after them.
Plus it will be cool to just see the prop floating in front of you... : )

-> Idea : maybe pure 0 impulse will look weird, as I guess the prop will be completly motionless. So I imagine them moving/rotating very very slowly upon being dropped, as irl, if you stop holding something in 0g, it would rarely be without 0 impulse, but would rather move slightly.

As discussed in the discord, it could be done with a different modifier key : RightAlt, or alt-rightclick for instance.

Thank you ! : )