[FIX] web_editor: do not ask for link style during menu item edition
[FIX] web_editor: do not ask for link style during menu item edition

The menu item dialog is an extension of the link dialog where all the
.form-group elements which contain a .link-style option element are
removed. A new link style option was recently added but with the wrong
class, preventing it to be removed for the menu item dialog.

task-1878245

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo