Modularise the flag
-- Now an additional side just needs to supply its own model and texture, with correctly named model pieces e.g. japflag, itaflag where the prefix matches that in sidedata
* Cleanup for previous
* Fix MG visuals
Copied gui_armor from AdditionalSides as it is better there - it properly shows HEAT+AP config
* Remove unused armordefs
* Really make sure flags take no damage ever
* Fix typo