Set the survey in fullscreen (without the ribbon) and fixes the 404 page when
refreshing the survey management end page.
The end page has also been slightly modified by:
- hiding the header because it only contains relevant information when the
survey is running (link to join, number of person having answered the current
question, ...)
- hiding previous arrow which were not working (as the session is closed)
- hiding the next arrow which is not relevant and wasn't working
Task-2791044
closesodoo/odoo#90225
X-original-commit: dd6b007e174c19aeb45c1530aff987c393e36f70
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>