flag -q in item objective now works
added isPlayer method to util
quest item is now undroppable and can't be moved from player's inventory
added SLOT condition, which requires player to have space in inventory
added interact limitations to both right and left click
commiting forgotten getOne method used by quester signs and trait
left click on holder with single active quest now displays description
nothing is displayed when player already started that quest
/q help is now properly formatted
changed priorities of quest item related events