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

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39797 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/font.cpp

@@ -25,10 +25,10 @@
     #include "wx/utils.h"
     #include "wx/settings.h"
     #include "wx/cmndata.h"
+    #include "wx/gdicmn.h"
 #endif
 
 #include "wx/fontutil.h"
-#include "wx/gdicmn.h"
 #include "wx/tokenzr.h"
 
 #include <strings.h>