Odoo Release Updates

[IMP] mail: improved readability of mobile discuss app

[FIX] mail: save chathub in `closeChatWindow`

[FIX] mail: avoid error on service worker push subscription change

[FIX] mail: fix style of thread icon in discuss sidebar

[REF] mail, *: clean up channel_pin

[IMP] crm,*: harmonize form and encourage partner_id creation

[FIX] mail: fix test "cannot leave channel with group_ids"

[FIX] mail: fix chat bubble crash on channel delete

[FIX] mail: crash on mark as read from sidebar action

[IMP] mail: remove useless calls to channel pin in sub channel test

[FIX] mail, *: open chat window in current device

[FIX] mail: fix small issues in sidebar channel template

[REF] mail, *: remove model from channel relation in Store

[REF] mail: subchannel feature use channel

[IMP] im_livechat,*: track how long chat has been waiting for help

[CLN] mail: clean duplicated member access tests

[IMP] mail: enhance clarity of discuss invitation fallback

[IMP] mail: add shortcut to minimize the meeting full screen

[FIX] mail: use channel model in data response

[IMP] web: cache avatars to make them available offline

[FIX] mail: fix z-index of a avatar in avatar-stack

[REF] mail: move call thread code to channel

[IMP] mail: enable pivot and graph views for activities

[REF] mail: move notifyAvatarToServer to channel

[IMP] web,calendar: add attendee partner popover

[REF] mail: use channel for parent_channel_id and sub_channel_ids

[FIX] Html_editor: show overview of attachment in chatter

[IMP] mail: enable icon map on related field in badge widget

[FIX] mail: restore paragraph bottom margin in chatter messages

[PERF] mail: introduce discussAppAsThread inverse