fix #109 enhance card board reliability, workaround free not being available in builds

src/logic-scenes/board/card-board.gd

@@ -166,7 +166,7 @@ func add_card(card: Card):
 	
 func add_sticky_note(sticky: StickyNote):
 	var new_panel = StickyNotePanel.new()
-	sticky_note_container.add_child(new_panel, false, Node.INTERNAL_MODE_DISABLED)
+	sticky_note_container.add_child(new_panel, true, Node.INTERNAL_MODE_DISABLED)
 	#WARNING this for some reason would break the tweens
 	new_panel.set_owner(self)
 	sticky.current_handle = self

src/logic-scenes/board/empty_sticky_note_panel.gd

@@ -36,6 +36,7 @@ func attatch_sticky_note(attatchment: StickyNote, custom_owner: Node, tween:bool
 	is_attatching = false
 	attatchment.owner = custom_owner
 	attatchment.position = ancor_position
+	attatchment.current_handle = custom_owner
 
 var is_gapped: bool = false
 func create_gap():
@@ -75,7 +76,7 @@ func clear_if_empty():
 	height_tween.tween_property(self, "custom_minimum_size", Vector2.ZERO, 0.3)
 	await height_tween.finished
 	owner.on_sticky_panel_cleared()
-	self.free()
+	self.queue_free()
 
 func replace_sticky_note_with(new_sticky_note: StickyNote):
 	if is_empty():

src/logic-scenes/board/sticky-note.gd

@@ -130,7 +130,7 @@ func _on_area_enter(card: Area2D):
 		attached_to.create_gap()
 
 func _on_area_exit(card: Area2D):
-	if hovering_cards != []:
+	if hovering_cards != [] and card is Card:
 		if card in hovering_cards:
 			hovering_cards.erase(card)
 			card.highlighted = false