Since rev. 1ce0b70a02294eb58dbe7c0ff1d7048489585e7a, ir.ui.menu
was readable for employees and portal users only
Since rev. 74aa7406bf1cd1794f9832ed36141482f7ff9353, the navigation menus
were displayed for employees and portal users only.
Therefore, when sharing a record with the share feature, nothing was
displayed when following the link.
This rev. introduces a new group "Shared group", implied for all shared groups
created through the share feature.
Read access to menus is given to this group
The possibility to display the webclient navigation menus as well.