Spells: Focus of Spirit and Visions of Grandeur should not stack

[Kirdan]

per this patch ~6 months after Luclin,

Focus of Spirit should no longer overwrite Visions of Grandeur.

FoS and VoG were not stacking prior to this patch due to a dex conflict in slot 3. See the Lucy history for FoS here and for VoG here. On the same date as the patch note,

2002-05-08 13:28 Added Slot 5: Increase DEX by 60
2002-05-08 13:28 Removed Slot 3: Increase DEX by 60

FoS had its dex component moved to a different slot to remove the stacking issue. The dex component has always been slot 3 for VoG.