Some fixes for registration flow
* in mobile, make Add to iCal / Add to Google Calendar buttons take all
the screen width. Otherwise they have different widths, each button on
a line, and this is quite ugly;
* add a margin on address in mobile as it is displayed below registration
information and not on its right;
* display "Registered" badge in tickets section as all other Registered
badge;
Linked to task ID-2314778
Feedback from internal testing
PR #55702
X-original-commit cf232f7317d81d44faebc20424a2a6b17c87ccae
closesodoo/odoo#55866
X-original-commit: d924ace56943405ee4c8f33916c5b5d5264675eb
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>