Postpone EnsureVisible() to idle as this sometimes seems to be required, fixes #12480: wxDataViewCtrl::EnsureVisible does not make item visible in some

circumstances on GTK

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65562 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/dataview.h

@@ -200,6 +200,7 @@ private:
     GtkWidget               *m_treeview;
     wxDataViewCtrlInternal  *m_internal;
     wxDataViewColumnList     m_cols;
+    wxDataViewItem           m_ensureVisibleDefered;
 
     virtual void AddChildGTK(wxWindowGTK* child);
     void GtkEnableSelectionEvents();