Add / Delete items

	Insert new child item Item label Insert new item next Item label Delete item Get list of checked

0s passed to the function for arguments 4-7 (function to call on select, images) mean use default values for them

Last argument is a comma delimited string of following possible value (upper case only):

SELECT - move selection to this node after inserting

CALL - call function on select

TOP - add node to the top position

CHILD - node has children

CHECKED - checkbox is checked (if exists)