preInit no longer called when returning to 3den

[PabstMirror]

Not sure if 1.60 or today's hotfix but 3den no longer calls functions with preInit = 1
The first time loading into 3den XHE-Preinit works because of the fix in PR #295
But loading into a mission and then returning to 3den will not re-run preInit;
E.G. No PREP functions will be defined.

For me this is breaking a 3den attribute system I made, but I could move everything over to CfgFunctions as they seem to be working fine.

I know we had some disscusion if running preInit in 3den is even necessary.