Clean up HedgeEditor HWP mess, fix broken/outdated graphics - Simplify ammo menu icons - Add Ammos_bw.png - Simplify Target.png - Fix dud mine preview looking like normal mine - Fix weapon crate preview of air attack, drill strike, napalm

void fpcrtl_halt(int num) {
    __coverity_panic__();
}

int fpcrtl_abs(int num) {
    return num >= 0 ? num : -num;
}