Applied modified form of the StdButtonSize patch.

Tested on GTK2, MSW and Mac.
  Adapted various generic dialogs to stretch the
    button sizer so that the buttons don't end
    up centered but right aligned.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31198 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dialog.h

@@ -20,6 +20,9 @@
 #include "wx/containr.h"
 #include "wx/toplevel.h"
 
+class WXDLLEXPORT wxSizer;
+class WXDLLEXPORT wxStdDialogButtonSizer;
+
 #define wxDIALOG_NO_PARENT      0x0001  // Don't make owned by apps top window
 
 #ifdef __WXWINCE__
@@ -56,6 +59,7 @@ public:
 #if wxUSE_BUTTON
     // places buttons into a horizontal wxBoxSizer
     wxSizer *CreateButtonSizer( long flags );
+    wxStdDialogButtonSizer *CreateStdDialogButtonSizer( long flags );
 #endif // wxUSE_BUTTON
 
 protected: