Make prefixes for radio chanels consistent between jobs.

[myeffort]

I don't know anything about baystation and I did not have it in mind when I made my proposal. Problem occurs when, in order to speak on science channel. RD needs to use :r and scientists need to use :h. When CE needs to speak on engineering channel he needs to use :e and engineers, miners, mechanics, QM use :e. Medical Director uses :m, medics use :h. I haven't played security in a while, but I assume they use :h where Captain, HoP and HoS use :g. Difference between heads and personnel is insignificant compared to choice of genre of responsibilities I believe that nomenclature of channels at it's present state is a mistake and it will be beneficial to fix it.