[IMP] {website_}event: improve tour usability

This commit makes few changes in the event tour as
listed below:

 * Remove the step asking user to save the event, as the next step is
   redirecting to the website which already triggers a save
 * Make the tip for website redirection appeaer in edit mode also
 * Fix a typo ("registering" instead of "registrating")
 * Instead of having to go to a specific stage, moving to any stage is
   now enough for going to next step

taskID-2446215

closes odoo/odoo#68235

Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>