Instead of modifying MLRS rocket velocity for targets that are beyond angle range, adjust gravity instead. Rockets which always have the same horizontal velocity should be easier to tune re SAM site hits.
- MLRS rockets now show their explosion FX in the air, while still causing actual damage at the ground
- Converted ServerProjectile's ProjectileImpact from using SendMessage to using an Interface and GetComponent. Done since I needed to pass an extra parameter, but might provide a ~10x performance speedup as a bonus.
- MLRS fire button light now flashes
- Spacebar closes MLRS targeting dialog