Add settings to define what are Arcane Foci, Druidic Foci, Bardic Foci and Divine Foci.

[ccjmk]

This would allow showing the focus type as part of the name in the Equipment searches, as the list of available foci is not intuitive to find.

As an alternative, after retrieving the indexed items, any items with Spellcasting + chosen class on the description should be shown as Spellcasting Focus (but would be a very hacky way of going around this)