set listview extended styles after switching to report view and not only when creating it (bug 1874996) [backport of 51390 from trunk]

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@51773 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/listctrl.h

@@ -431,6 +431,11 @@ private:
     // process NM_CUSTOMDRAW notification message
     WXLPARAM OnCustomDraw(WXLPARAM lParam);
 
+    // set the extended styles for the control (used by Create() and
+    // UpdateStyle()), only should be called if InReportView()
+    void MSWSetExListStyles();
+
+
     DECLARE_DYNAMIC_CLASS(wxListCtrl)
     DECLARE_EVENT_TABLE()
     DECLARE_NO_COPY_CLASS(wxListCtrl)