Ability to share DTC without sharing files.

[777coletrain]

There should be an option to load a DTC that another player sends to you without going into the user files. It would be nice to have a "Upload multiplayer DTC" and "Load multiplayer DTC" in the DTC menu. This would allow for a flight lead to push COM presets and in the future, lines and other info without having to teach people the file path.