Added labels to AngledBox, BasedBox, ClosedBox, Console2, DinRailBox, DisplayCase and ElectronicsBox
Having this call there was necessary in the past as the open() method would need the canvas size as a parameter. This is now determined automatically after rendering. Still calling open() is deprecated but won't result in an error.
There is really no need for all the generator to care Still calling it is deprecated but won't result in an error