Followup on 82ce815a8c . When content (`slide.slide`) is
duplicated, public_views should not be copied. Indeed it gives a new slide
and it makes no sense to keep the old slide statistics.
closes odoo/odoo#46084
X-original-commit: a2f5f8b552b48483ce5fdf0be04da7c27b326f2e
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>