NPCs: allow Primary/Secondary attributes

When they are of the type, "Character," make the attribute abbreviations (i.e., "Str," etc) clickable and tri-state, just like the attribute titles on the main character sheet (red for Primary, blue for Secondary). The, according to the setting on the NPC sheet, adjust any attribute checks made by rolling on the NPC sheet.

Since this game mechanic is C&C specific, I'm guessing this shouldn't be a CoreRPG change request.