[FIX] web_tour: ideal tip location for html and body element
[FIX] web_tour: ideal tip location for html and body element

When searching the ideal location for a tip on the body or the html
element, the previous implementation was wrong. In that case, the ideal
location is always the body.

dfang/odoo,hip-odoo/odoo,dfang/odoo,hip-odoo/odoo,hip-odoo/odoo,dfang/odoo,dfang/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,dfang/odoo,ygol/odoo,dfang/odoo,hip-odoo/odoo,ygol/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo