Make it easier to change tank release pressures

[BruceHenke]

Having to set the canister release pressure to max and my tanks release pressure to the minimum takes a very long time and is very strenuous on my mouse. Simply make it so you can click on the release pressure and enter the value you want (like the heater in chemistry) would entirely solve this problem very easily.

[Marquesas]

Also add an M button please to both sides (max and min).