Breath mask and internals box bug fix + new satchels/backpacks [DO NOT MERGE/WIP]

Fixes https://github.com/NTStation/NTstation13/issues/591

Adds a toggle option for the breath mask, but instead of it being up on your head, it hangs down around your neck. Re-worded the code for pushing masks up to allow for other things to be pushed out of the way (cigarettes up behind your ear, for example) in directions that aren't just up.