PURPOSE

Improve performances of various Odoo code bits.

SPECIFICATIONS

Use a read_group to compute number of checks to print, using a search_count
instead of a search.

LINKS

Task ID-2281297
PR odoo/odoo#53053
PR odoo/enterprise#11299

closes odoo/odoo#56852

X-original-commit: f4c90e7d
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>