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Removed FormComponent.setPersistence()
WICKET-2213: At the very beginning of Wicket we introduced FormComponent.setPersistence() with the idea to make creating Login panels very easy. Basically Wicket would deal with the Cookie handling for the login details. Now some years later it is evident that this feature is not very useful:
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There is an example in wicket-examples which demonstrates the usage of this.
Header render sequence inverted
In Wicket 1.4 header contributions were rendered parent first. Since 1.5 we render the deepest child first. Now it's possible for containers, which manage their children, to supersede a childs contribution. See WICKET-2693
List of renamed classes and methods
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