* = hr_holidays, im_livechat, website_livechat

A huge amount of components where rendered for no reason, notably when typing a
new message (at every key press), which significantly slowed down the interface.

There were 2 causes to this number of renders:
- OWL rendering all children automatically, even if their props didn't change,
  unless `shouldUpdate` is overridden, which is now done.
- `useStore` selectors being way too generous in what they observed

task-2399731

closes odoo/odoo#62703

Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

find is O(n) and findFromIdentifyingData is O(1)

task-2440693

closes odoo/odoo#64712

Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

This avoid text flickering when a multiline channel name is hovered in the
discuss sidebar.

task-2274991

closes odoo/odoo#63084

Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>

This PR has 3 parts:

The members fix itself, which is necessary for performance reasons especially
at init messaging, as per described in the task.

Adding the partner name in the typing payload, because due to not knowing all
members anymore, it is necessary to properly display who is typing.

Restrict restoring scroll position only if the corresponding scroll height is
available, to make the scroll feature and particularly the corresponding tests
more robust.

task-2360020

closes odoo/odoo#60091

Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

Improve mock server:

- add support for mocked `fetch`
- add support for `active_test`
- add support for x2m `in` in domains
- add support for default values computed from a function
- implement a more natural "next id" compute
- allow initial data without ids
- ensure write and x2m commands integrity
- improve bad data/bad commands error messages
- always warn for failing RPC, not only in debug mode
- fix all existing tests that had inconsistency data

Other changes done in mail (or dependents) that are not just related to tests:

- remove `direct_partner` from formatter result
  ->`correspondent` can be computed from other keys, especially `members`

- fix `livechat_visitor` convertData
  -> only process if there is value

- add `current_partner` and `current_user_id` as `init_messaging` result
  -> easier to mock than session

- remove usage of `need_moderation`
  -> that was just a search indirection to `moderation_status`

- adapt `partner_id` -> `res_partner_id` key in `_notification_format`
  -> to be consistent with field name

- add name in result of `mail_partner_format`
  -> sometimes display_name is not the same

- remove usage of `is_moderator`
  -> that was just an indirection to `moderation_channel_ids`

Enterprise counterpart: https://github.com/odoo/enterprise/pull/11523
task-2287171

closes odoo/odoo#55854

X-original-commit: 7ba3fecb3377a720d1eb70e7515a0c45da73836d
Related: odoo/enterprise#12391
Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>

FIX: use the correct API of mail.channel.py to unfollow a channel
i.e.: `execute_command_leave`

FIX: unpinning a channel has immediate effect on the interface
chatWindows are closed, and the inbox is displayed

FIX: unpinning a channel destroys corresponding chatWindows across tabs
It also unpins the channel in other tabs

FIX: python sends is_pinned as part of the channel_info
both at init messaging and in the main bus notification
That way, we can keep track of the synchronization of the pin status
between JS and python

task-2275000
task-2267941

closes odoo/odoo#53703

X-original-commit: d4fcc64acb2fc0c6fd9df505380f665abd8b39c4
Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

This commit is a significant rewriting of client-side discuss, chatter,
chat window, and messaging menu using OWL. The behavior should be broadly
the same, with some slight functional changes here and there.

From a technical standpoint, the code of messaging is mainly organized in 2
main groups of modules:

- models, which are logical entities that depict the client-side state of
  messaging as a whole.
- components, which are in charge of displaying information from models.

This refactoring also introduces new JS guidelines regarding folder structure
(/static) and naming rules for JS modules.

Community PR: https://github.com/odoo/odoo/pull/39023
Enterprise PR: https://github.com/odoo/enterprise/pull/6249

Task-1914207

This PR is a collaborative work by Alexandre, Julien, Sébastien and Xavier,
with the precious help of Lucas to speed it up towards the end.

closes odoo/odoo#39023

Related: odoo/enterprise#6249
Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>
Co-authored-by: Alexandre Kühn <aku@odoo.com>
Co-authored-by: Julien Giannone <jgi@odoo.com>
Co-authored-by: Lucas Perais <lpe@odoo.com>
Co-authored-by: Sébastien Theys <seb@odoo.com>
Co-authored-by: Xavier Dubuc <xdu@odoo.com>