tdf#148197 gtk_tree_row_reference_new_proxy warning on docking navigator
Gtk-CRITICAL **: 09:05:11.124: gtk_tree_row_reference_new_proxy: assertion 'path->depth > 0' failed
from TreeView::set_cursor(-1)
gtk_tree_view_set_cursor is ok (and documented as such) with an
"invalid" path to unset the cursor, but there isn't the same for
gtk_tree_view_scroll_to_cell, though there null is docs as acceptable.
Change-Id: I11b94ba997fbbd2f31031d9e73765ea1882ad9ae
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/132872
Tested-by: Jenkins
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>