[ADD] mass_mailing_sale: add UTM statistics on mass mailing linked to sale orders

Purpose: better showcase the integration between email marketing and sale
application thanks to UTM links.

Specifications

 * add 2 stat buttons to the mass mailing form;
 * XX Quotations -> redirects to quotation list view;
 * YY Invoiced -> redirects to invoice list view. Use the account invoice
   report to generate the invoiced amount;
 * those stats buttons are linked to UTM trackers used in the mass mailing
   itself: campaign, source and medium. Those can be configured notably using
   the website_link module;
 * display the stat buttons even if no data;
 * update demo data;

This commit is linked to task ID 1872198 and PR #26188.

0 files changed, 0 insertions, 0 deletions