[FIX] mail, *: significantly reduce number of useless renders

* = 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>

1 files changed, 2 insertions, 9 deletions

diff --git a/addons/im_livechat/static/src/components/discuss_sidebar/discuss_sidebar.js b/addons/im_livechat/static/src/components/discuss_sidebar/discuss_sidebar.js
index 2dafeed4c79..35070cb8e6d 100644
--- a/addons/im_livechat/static/src/components/discuss_sidebar/discuss_sidebar.js
+++ b/addons/im_livechat/static/src/components/discuss_sidebar/discuss_sidebar.js
@@ -69,15 +69,8 @@ patch(components.DiscussSidebar, 'im_livechat/static/src/components/discuss_side
      */
     _useStoreSelector(props) {
         return Object.assign(this._super(...arguments), {
-            allOrderedAndPinnedLivechats: this.env.models['mail.thread']
-                .all(thread =>
-                    thread.channel_type === 'livechat' &&
-                    thread.isPinned &&
-                    thread.model === 'mail.channel'
-                )
-                .map(livechat => livechat.__state),
-            }
-        );
+            allOrderedAndPinnedLivechats: this.quickSearchOrderedAndPinnedLivechatList(),
+        });
     },
 
 });