[IMP] *: replace mobile menu feature by new mobile layout

See community commit for details.

task-3060986

Part-of: odoo/design-themes#651

theme_notes/models/theme_notes.py

@@ -5,5 +5,4 @@ class ThemeNotes(models.AbstractModel):
     _inherit = 'theme.utils'
 
     def _theme_notes_post_copy(self, mod):
-        self.enable_header_off_canvas()
         self.enable_view('website.template_footer_descriptive')