Appointment types and helpdesk teams now show follower management as a simple tag field instead of an empty message area. This makes it easier for users to add people who should receive updates, including default notifications for new helpdesk tickets.

Replaces the empty chatter in appointment.type
by a m2m_tags field to allow managing followers of the type.

Task-2804888
--
I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

Spreadsheet users can now apply global filters for the last 90 days or last 180 days. This makes it easier to analyze recent business activity over common quarterly and half-year periods without manually setting date ranges.

Add a relative global filter for the last 90 days, and one for the last
180 days.

Odoo task [2968572](https://www.odoo.com/web#id=2968572&cids=1&menu_id=4720&action=333&active_id=2328&model=project.task&view_type=form)

Helpdesk now includes a setting to turn off the properties field on support tickets. This gives businesses more control over ticket forms and helps keep the support workflow simpler when custom properties are not needed.

Purpose
=======
Add a setting to disable the properties field on tickets.

Task-2965523