No way to change sort column programatically in GtkColumnView

GNOME Files needs a way to set the sort column at runtime from a menu action, as requested by designer.

However, doing this by calling gtk_column_view_sort_by_column() results in the previous sort column header still drawing an arrow:

Indeed, I realize what I am doing is not supported, as per documentation of gtk_column_view_sort_by_column():

 * This function should be used to set up the initial sorting.
 * At runtime, users can change the sorting of a column view
 * by clicking on the list headers.

So, I would request to expand the scope of this method to support this use case.

I can provide a patch, for which I see two apparently simple possible solutions: either having gtk_column_view_sort_by_column() always call gtk_column_view_sorter_clear() before gtk_column_view_sorter_set_column(), or having gtk_column_view_sorter_set_column() call gtk_column_view_column_notify_sort() on the previous first sorte column, as gtk_column_view_sorter_add_column() already does.

Indeed, I can workaround this whole issue by calling gtk_column_view_sort_by_column() twice, the first time passing NULL for the column. But this is ugly and probably the wrong thing to do.