Introduce two dialogs for debugging - a Set SDF dialog and a Debug Help dialog

- sd_legit() moved into cParty class

src/pcedit/pc.editors.h

@@ -5,3 +5,4 @@ bool take_gold(short amount,bool print_result);
 void give_spec_items();
 void pick_race_abil(cPlayer *pc,short mode);
 void reset_boats();
+void edit_stuff_done();