Toggle cell on a sorted treeviewcolumn loses selection

[Nicolas SOUBEIRAN <nicolas soubeiran gmail com>]

Hi all,
I have a weird case on a treeview that displays a sortable column with 
an activatable toggle cell renderer.
If the column is sorted, when one activates the toggle, the tree is 
re-sorted (normal) but the selected row is changed (unexpected).
I investigated and I found that when clicking on a toggle cell renderer, 
the "activate" callback is send which update the treemodel.
After re-ordering, the function gtk_tree_view_button_press is called. 
This function checks which row is under the cursor and selects it.
I am looking for a way to trap this event to keep the selection on the 
"activated" row (like when one edits a text)