Odoo Release Updates

[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

[FIX] Sign: Prevent race condition when calling updateSignItemsCountCallback

[MOV] sign,web_editor: move html2canvas to sign

[FIX] sign: load fonts before rendering font selection

[FIX] sign: Improve stability of sign item placement during PDF rendering