* reroute several error conditions to I_Error.
* removed some soon-to-be obsolete GRP loading code.
* explicitly trigger the SetDefaults script events which depended on side effects from the config implementation.
* removed the nonsensical file system switch. All this does is create instabilities because it is non-obvious from where data is loaded. If a resource is mounted, it should be checked for content no matter what. While this may affect the stray weird mod out there it is a necessity if we want to allow transparent project repackaging.
Also removed the entire cruft related to this - the pointless offsetting value and the precalculation of the timer value (as if we could not afford a single division for something that WAITS!
Unfortunately this required removal of the menu option for the time being.