WIP: track creation and deletion both in frontend and backend.

Scripts/TrackLineEdit.gd

@@ -4,6 +4,11 @@ func _ready() -> void:
 	text_submitted.connect(submit)
 
 func submit(text: String):
-	caret_column = 0
 	release_focus()
+	var owner = get_owner()
+	
+	if owner is Control:
+		var c = owner as Control
+		c.grab_focus()
+	
 	pass