Added wxExtDialog and sample.

Tried to make defs.h slightly more readable, also
    found some wrong flags then.
  Updated testconf.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2948 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/gridg.h

@@ -35,14 +35,6 @@
 #define wxGRID_DEFAULT_VERTICAL_LABEL_WIDTH 40
 #define wxGRID_DEFAULT_HORIZONAL_LABEL_HEIGHT 20
 
-#ifndef wxLEFT
-    #define wxLEFT 0x0400
-#endif
-
-#ifndef wxRIGHT
-    #define wxRIGHT 0x0800
-#endif
-
 #define WXGENERIC_GRID_VERSION  0.5
 
 class WXDLLEXPORT wxGridEvent;