Do we really want property assignment to do *things*

[dmwyatt]

1. It has a nice symmetry to get the maximized state of a window with notepad.maximized and to set the state of the window with notepad.maximized = False.
2. On the other hand, generally you expect to use a method call to do something.

Maybe we could support an API wherein you can do it either way?

notepad.maximize = True and notepad.set_maximized(True)?