Include wx/toolbar.h according to precompiled headers of wx/wx.h (with other minor cleaning).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39623 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/os2/frame.cpp

@@ -29,6 +29,7 @@
     #include "wx/settings.h"
     #include "wx/dcclient.h"
     #include "wx/mdi.h"
+    #include "wx/toolbar.h"
 #endif // WX_PRECOMP
 
 #include "wx/os2/private.h"
@@ -38,10 +39,6 @@
     #include "wx/generic/statusbr.h"
 #endif // wxUSE_STATUSBAR
 
-#if wxUSE_TOOLBAR
-    #include "wx/toolbar.h"
-#endif // wxUSE_TOOLBAR
-
 #include "wx/menuitem.h"
 
 // ----------------------------------------------------------------------------