merged 2.2 branch

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@7748 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/taskbar/tbtest.cpp

@@ -111,6 +111,11 @@ void MyTaskBarIcon::OnMenuRestore(wxCommandEvent& )
 void MyTaskBarIcon::OnMenuExit(wxCommandEvent& )
 {
     dialog->Close(TRUE);
+
+    // Nudge wxWindows into destroying the dialog, since
+    // with a hidden window no messages will get sent to put
+    // it into idle processing.
+    wxGetApp().ProcessIdle();
 }