Feature request: rearm should refill the on board oxygen

[MPK]

I don't know if it would be considered realistic or unrealistic, but from a game play perspective, it would be nice if the oxygen was replenished during a rearm.

When playing for a long time on a server like greyflag where you end up hundreds of miles from your starting point but can rearm continuously at closer airbases, I seem to run out of oxygen if I spent a lot of the time flying around at high altitude.