Give SC.InlineTextFieldView a default layout size of 0x0 so that it doesn't alter the scrollTop/scrollLeft of a parent view layer that allows overflow.
Tidies the unit test file.
Fixes a potentially huge memory leak when views that mix in SC.ContentValueSupport (or via SC.Control) will not remove all the content value observers from the content object when the view is destroyed. One result is that every time you scrolled a list of SC.ListItemViews back and forth it was appending more and more observers to the content.