Use a hash set instead of vector to hold dedicated keys in wxPG.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78173 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/propgrid/propgriddefs.h

@@ -18,6 +18,7 @@
 #include "wx/dynarray.h"
 #include "wx/vector.h"
 #include "wx/hashmap.h"
+#include "wx/hashset.h"
 #include "wx/variant.h"
 #include "wx/any.h"
 #include "wx/longlong.h"
@@ -315,6 +316,12 @@ WX_DECLARE_HASH_MAP_WITH_DECL(wxInt32,
                               wxPGHashMapI2I,
                               class WXDLLIMPEXP_PROPGRID);
 
+WX_DECLARE_HASH_SET_WITH_DECL(int,
+                              wxIntegerHash,
+                              wxIntegerEqual,
+                              wxPGHashSetInt,
+                              class WXDLLIMPEXP_PROPGRID);
+
 WX_DEFINE_TYPEARRAY_WITH_DECL_PTR(wxObject*, wxArrayPGObject,
                                   wxBaseArrayPtrVoid,
                                   class WXDLLIMPEXP_PROPGRID);