[FIX] web_settings_dashboard: access error

When a user has the access rights "Configuration" or "Access Rights"
regarding the "Administration" module category, the click on the
"Settings" menu leads to an access error.

This is because the dashboard fetches data about the number of installed
modules ("installed_apps"), which requires access to "ir.module.module".
Since it is not easily possible to hide a parts of the dashboard (the
static templates do not recognize the "groups" attribute), we simply
hide the dashboard for these users.

opw-678531

addons/web_settings_dashboard/views/dashboard_views.xml

@@ -4,5 +4,5 @@
         <field name="name">Dashboard</field>
         <field name="tag">web_settings_dashboard.main</field>
     </record>
-    <menuitem name="Dashboard" id="web_dashboard_menu" action="web_settings_dashboard_action" parent="base.menu_administration" sequence="-1" />
+    <menuitem name="Dashboard" id="web_dashboard_menu" action="web_settings_dashboard_action" parent="base.menu_administration" sequence="-1" groups="base.group_system"/>
 </odoo>