Odoo Release Updates

[IMP] mail,*: MailThreadCC removal, default subject and tweaks

[IMP] utm: improve and generalize UTM trackers data

[IMP] mail: search messages and activities with access using SQL + remove fetch override

[REF] mail, im_livechat: move /messages into /mail/data

[IMP] core: random serial for testing

[REF] *: Remap useExternalListener import to owl2/utils

[IMP] mail: improvements in call history

[REF] *: remap reactive import to owl2/utils

[IMP] mail, *: improvements to Discuss public page of portal users

[IMP] mail,im_livechat: add escalation notifications for visitors

[FIX] im_livechat: prevent traceback on tab press in chatter

[FIX] im_livechat: do not show leave warning on closed chatbot conversations

[REF] *: remap useState import to owl2/utils

[REF] *: remap useRef import to owl2/utils

[REF] *: remap useSubEnv import to owl2/utils

[PERF] mail: avoid sending inbox only-fields in chatter

[IMP] im_livechat: improve view contact button ui

[REF] mail, hr_{holidays,homeworking}: refactored im_status overrides

[REF] *: Replace useEffect with useLayoutEffect for owl3 migration

[FIX] im_livechat, *: compute channel name correctly for chatbot sessions

[IMP] mail, im_livechat: replace MessageConfirmDialog with dedicated dialogs

[IMP] mail, *: standardize `EmojiPicker` design

[IMP] mail: explicitly define singleton records

[IMP] im_livechat, *: harmonize Live Chat copywriting

[FIX] mail: muted color for looking for help live chat description

[FIX] im_livechat: no yellow bg in 'create lead' livechat action

[FIX] mail,website,im_livechat: interpolation of custom property values

[IMP] mail, *: Proper mask of IM status on Avatars

[IMP] mail: add default static id for js models

[IMP] im_livechat: remove chat hub options for public users