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

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39724 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/gdicmn.cpp

@@ -27,9 +27,9 @@
     #include "wx/cursor.h"
     #include "wx/settings.h"
     #include "wx/bitmap.h"
+    #include "wx/colour.h"
 #endif
 
-#include "wx/colour.h"
 #include "wx/font.h"
 
 WXDLLIMPEXP_DATA_CORE(wxBrushList*) wxTheBrushList;