ConditionalEvents

-Added player_offhand event, that completely replaces player_swap_hand event. Now it will detect changes on the offhand correctly. This includes new variables.

-Added %cursor:<variable>% variable to player_click_inventory event.

-Added "icon" property to give_potion_effect action.

-Fixed: Debug will now show if a default action group was overrided by cooldown or one_time action groups.

-Fixed bug with parameters on 'execute', when using variables with '=' character.

-Fixed: Call events can no longer be executed when disabled.

-Removed player_swap_hand event.