* Inverted the precedence between section edition and revision undoing, now undo...

* Inverted the precedence between section edition and revision undoing, now undo and undoafter will be ignored if the section (or even wpSection) is provided to be consistent the remaining of the interface
* Modified EditPage::getContent() to load the original content only when really needed
* Don't put the 'missing-article' in the textbox when a non-existing revision is provided, instead display it above the form
* Always diff to the current version when showing a conflict or a spam filter match
* Factorised code to get the current text on edit conflict
* Compare the correct text in EditPage::internalAttemptSave()
* Some little coding style fixes