Cleaned and improved some event stuff

scripts/UI/EventFlagMenu.gd

@@ -2,6 +2,8 @@ class_name EventFlagMenu extends Panel
 
 @export var flagList:ItemList
 @export var grid:GridContainer
+@export var btnClose:Button
+
 var checkboxes:Array[CheckBox] = []
 var selectedEvent:int = -1
 
@@ -24,6 +26,7 @@ func _ready() -> void:
 
 	EVENT.eventFlagUpdated.connect(_on_EventFlagUpdated)
 	flagList.item_selected.connect(_on_EventSelected)
+	btnClose.pressed.connect(close)
 
 func _exit_tree() -> void:
 	EVENT.eventFlagUpdated.disconnect(_on_EventFlagUpdated)