Add slot_index to on_player_set_quick_bar_slot

[eradicator]

on_player_set_quick_bar_slot is currently difficult to use because it contains no information about what actually changed, only for whom it changed.

It would be nice if it contained the slot index(es) that were affected.

Code: Select all

old_slot_index :: uint, (optional) If the filter was moved from another slot the index of that slot.
new_slot_index :: uint, (mandatory) The slot that the new filter was set to.