This ensures that all code and designer views of the same form class are synchronized correctly.
Fixes SD2-1175: .Designer.cs file is saved even if user chooses not to save changes.
ActiveWindowStateConditionEvaluator now checks the dirty state of all view contents of the active window, not only the active view content. This makes the 'enabled' state of the save button consistent with its function.
git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@3390 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61