任務ソート時に落ちる不具合を修正
任務ソート時に落ちる不具合を修正

herix001/ElectronicObserver,RyuuKitsune/ElectronicObserver,brunei-admiral/ElectronicObserver,tsanie/ElectronicObserver,CNA-Bld/EOE-Sandbox,Cosmius/ElectronicObserver,brunei-admiral/ElectronicObserver,Gizeta/ElectronicObserver,troughProject/ElectronicObserver,nekopanda/ElectronicObserver,nekopanda/ElectronicObserver,RadarNyan/ElectronicObserver,sorube314/ElectronicObserver,CAWAS/ElectronicObserverExtended,yukun0406/ElectronicObserver,Arathi/ElectronicObserver,cnrpman/ElectronicObserver,quzzimi/ElectronicObserver,kanonmelodis/ElectronicObserver,andanteyk/ElectronicObserver,feonman/ElectronicObserver,fin-alice/ElectronicObserver,CNA-Bld/ElectronicObserver