@JeanYves
When you edit a “Window” you are NOT editing a Class
Its more like editing a specific instance (think of a control on a Window - thats a specific instance of the control NOT the class the control is based on)
You cant edit inspector behaviour for an instance
Containers though ARE more like a class so you can edit their inspector behaviour
IF you wanted to edit the inspector behaviour for a Window then you would need to
- add a new class
- set its super to Window
- add whatever properties you want to that
- now when you add a new window to your project make the new windows super the class you created and you can set those properties you added
BUT this doesnt work
Never has with windows as far as I recall - their handling IS a little borked