[QoL] More consistent peeing into reagent containers

[pali6]

With this patch if you have a balloon / drinking glass / beaker / watering can in your active hand and it's not full you will pee inside of it instead of peeing onto the ground when you use *pee. That seems pretty intuitive to me and it makes things more consistent across the various reagent containers.

https://github.com/goonstation/goonstati...6/pull/147