toggle_website_menu (in website_event_track module) is called by website_event
set_customize_options (in website_event module). Since website_event_track is
not installed by default when website_event is installed, this function might
not be available in the event.event model. Therefore toggle_website_menu has
been moved from the event.event model in website_event_track to the event.event
model in website_event.
Followup of bd99cc24b1
Task ID 2244487
PR #51503
X-original-commit: e541efe1338f853962560db4d982821707ddc3c6