Fix generation of mouse events for wxDataViewCtrl with GTK

See #12650

include/wx/gtk/dataview.h

@@ -221,6 +221,7 @@ protected:
     virtual void DoExpand(const wxDataViewItem& item) wxOVERRIDE;
 
     virtual void DoApplyWidgetStyle(GtkRcStyle *style) wxOVERRIDE;
+    virtual GdkWindow* GTKGetWindow(wxArrayGdkWindows& windows) const wxOVERRIDE;
 
 private:
     void Init();

src/gtk/dataview.cpp

@@ -4734,6 +4734,11 @@ bool wxDataViewCtrl::Create(wxWindow *parent,
     return true;
 }
 
+GdkWindow* wxDataViewCtrl::GTKGetWindow(wxArrayGdkWindows& /* windows */) const
+{
+    return gtk_tree_view_get_bin_window(GTK_TREE_VIEW(m_treeview));
+}
+
 wxDataViewItem wxDataViewCtrl::GTKPathToItem(GtkTreePath *path) const
 {
     GtkTreeIter iter;