Odoo Release Updates

[FIX] mail: restore formatting of full composer content

[FIX] base: ensure an uniform environment between action variables

[FIX] mail: prevent horizontal scrollbar in messaging menu

[FIX] mail: show thread name in invite and notification dialogs

[IMP] mail: meeting channel revamp

[IMP] test_mail: improve msg/activity test access coverage

[REF] *: remove synchronous assertions in tours

[IMP] mail: redesign message highlight effect for better focus

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

[FIX] mail: fix insertion of mixed up many commands

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

[IMP] mail: search messages panel improvements

[FIX] mail: ensure attachments are visible when editing activities

[FIX] mail: pin sub-channel for mentioned users

[FIX] im_livechat: prevent local storage loops

[IMP] mail: explicitly define singleton records

[IMP] mail: show message edited datetime on mouse-hover

[FIX] mail: weird overflow of active action in dropdown

[FIX] mail: don't show timezone when same as self user in avatar card

[IMP] mail: rename 'Invite a User' to 'Invite People'

[IMP] mail: cleanup mention plugin

[FIX] mail: prevent traceback on free activities

[FIX] mail: clear mail activities before testing KPIs

[IMP] html_editor*: add google translate and refactor the translation

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

[FIX] orm: avoid groupby on models with custom `_select`

[IMP] mail: show call permissions modal when microphone access is blocked

[IMP] mail: more alignment in search and check access

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

[IMP] web: replace a[href="#"] by actual button element