1. fixed small bug with toolbar size updates

2. fixed bug with showing message box from wxApp::OnInit()
3. fixed crash on DDE client disconnection
4. fixed wxExecute() which was broken since quite some time (hidden
   window creation problems) and in wxShell()


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5434 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/utils.cpp

@@ -454,7 +454,7 @@ bool wxShell(const wxString& command)
         cmd.Printf(wxT("%s /c %s"), shell, command.c_str());
     }
 
-    return wxExecute(cmd, FALSE) != 0;
+    return wxExecute(cmd, TRUE /* sync */) != 0;
 }
 
 // ----------------------------------------------------------------------------