Odoo Release Updates

[FIX] mail: fix use foward refs to parent

[FIX] mail: fix poll result text overflow and icon alignment

[FIX] mail: prevent crash when showing result of unknown poll

[FIX] mail: update guest name in member list when join using welcome page

[FIX] mail: make message search / read coherent for portal

[FIX] mail: correctly check message / document access

[IMP] mail: add missing docstrings for message access

[IMP] mail: reduce call permission dialog size

[FIX] mail: fix sub-channel search tour

[FIX] mail: prevent error when disabling blur background in CallPreview

[FIX] mail: id in mail_composer_plugin

[IMP] mail: allow adding more poll options before filling them

[FIX] im_livechat, *: last agent leaving from chat window ends convo

[IMP] mail: introduce MentionPlugin

[FIX] mail: replace `new meeting` icon with an SVG

[FIX] im_livechat: fix race condition

[IMP] mail: add favorite channels

[FIX] mail: add force_search_count to activity search

[FIX] bus: websocket worker incorrectly detects user changes

[FIX] mail: prevent re-ending already ended polls

[IMP] html_editor: shortcut tooltips in toolbar

[FIX] mail: prevent traceback when adding emojis to a poll option

[FIX] mail: prevent recursive dialog on LinkPreview deletion

[FIX] mail: search panel in mailbox takes whole screen width in mobile

[REF] mail: more generic rule for simulate dark theme bg color

[IMP] mail: introduce channel category model

[IMP] mail: store the email used to contact the recipient

[IMP] mail: return thread instead of thread_id in message_process

[IMP] mail: refactor message previewText

[IMP] mail,*: do not display the Invite people action for channel and groups