Made code that uses wxArrayPGProperty more STL compliant (still can't use wxVector for it because I think there is no wx equivalent of std::sort)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61695 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/propgrid/propgridpagestate.h

@@ -517,6 +517,8 @@ public:
         return DoSelectProperty(NULL);
     }
 
+    void DoRemoveFromSelection( wxPGProperty* prop );
+
     wxPropertyCategory* GetPropertyCategory( const wxPGProperty* p ) const;
 
     wxPGProperty* GetPropertyByLabel( const wxString& name,