Odoo Release Updates

[REF] *: use ir.config_parameter new API get_xxx, set_xxx

[IMP] base,all: remove deprecated 't-esc' ir.qweb directive

[IMP] sign: user writeable fields

[IMP] sign: improve UI/UX for field type

[FIX] sign: convert html fields auto content to plain text

[FIX] sign: prevent crash when multiple line item are constant

[REF] *: cleanup legacy test helpers

[FIX] sign: show newest sign requests first in Documents list

[FIX] sign: used the compatible method with PyPDF 3.x

[FIX] sign: fallback sign item name whe no placeholder is available

[FIX] sign: issue while drag and drop in multiple document

[FIX] sign: show documents in download dropdown when opened from chatter

[FIX] sign: remove extra spacing from stamp text in preview mode

[FIX] sign: hide Thank You dialog in portal after signing documents

[FIX] sign: remove problematic spaces in front of paths

[FIX] sign: avoid mixing field models

[IMP] appointment, *: remove obsolete .btn-block

[FIX] sign: filter out field type on the reference document

[FIX] sign: fix quicksign inconsistencies in preview & chatter logs

[FIX] sign: make stamp field editable

[IMP] *: new manifest field `iap_paid_service`

[ADD] sign_ai: bridge module between Sign and AI

[FIX] sign: signing order changes back automatically

[FIX] sign: allow public users to copy sign requests without access error

[REF] hr_payroll,knowledge,sign: adapt manifest after web_editor removal

[FIX] sign: fix wizard traceback while change template

[FIX] sign: prevent error when uploading PDF in debug mode

[IMP] web: revamp of the notification

[IMP] *: improve UI of the preferences form and user form for admin

[IMP] *: use the "icons fonts" sub-asset-bundle in all asset bundles