Can we rename windowIsOpened into openedWindow

[Ducasse]

windowIsOpened looks like a testing predicate but this is not

windowIsOpened

	isClosed := false

[Ducasse]

windowIsClosing (used in Morph - bad idea) would be better named windowClosing

The is conveys the idea that this is a predicate.

[Ducasse]

windowIsOpening should be renamed windowOpening to follow windowClosing above

windowIsOpening

	self windowIsOpened

[Ducasse]

windowClosed
	
	isClosed := true.
	self application windowClosed: self

-> closeWindow