Applied Christian Hornung's fix for SD2-562. The ViewContents are notified of deselection prior to the workspace layout being changed.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@789 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Main/Base/Project/Src/Gui/Workbench/Layouts/SdiWorkspaceWindow.cs

@@ -234,6 +234,9 @@ namespace ICSharpCode.SharpDevelop.Gui
 			if (viewTabControl != null) {
 				foreach (TabPage page in viewTabControl.TabPages) {
 					page.Controls.Clear();
+					if (viewTabControl.SelectedTab == page && page.Tag is IBaseViewContent) {
+						((IBaseViewContent)page.Tag).Deselected();
+					}
 				}
 				viewTabControl.Dispose();
 				viewTabControl = null;