The simple form of this works, but without the multi-mode routing it'll
only get used when the final destination is a port with a link to a port
with a factory.
These also aren't targetable or simulated yet.
https://github.com/Khopa/dcs_liberation/issues/826
The previous flight plan only makes sense if the convoy will make it a
significant distance from its starting point. At road speeds over the
typical mission duration this is not true, so we can actually plan this
as if it was a strike mission near the origin point and that's close
enough.
There's some cleanup work to do here that I've added todos for.
Fixes https://github.com/Khopa/dcs_liberation/issues/996
Mildly breaks save compat with 2.3; All existing flight dialogs will be
broken, passing the turn or recreating all the flights in the UI will
allow you to continue
Splits infantry and other unit IDs.
Resets IDs to start from zero at each press of "Takeoff"
Direct access to the the `Game` class IDs is done on the `Operation` class to
preserve save compat
