[FIX] mail: fix "New messages" separator and channel_seen behaviour

- channel_seen is now called even for own message and only when needed
- channel_seen is now called with a message_id which transfer the
  decision of what is seen to the client which makes more sense

task-2282235
task-2282248

closes odoo/odoo#57950

X-original-commit: 04edfa50ccea305050d017c4a1996e561bc7bd57
Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>

1 files changed, 0 insertions, 6 deletions

diff --git a/addons/im_livechat/static/src/models/thread/thread.js b/addons/im_livechat/static/src/models/thread/thread.js
index 1ec06246ec7..9f728f62d40 100644
--- a/addons/im_livechat/static/src/models/thread/thread.js
+++ b/addons/im_livechat/static/src/models/thread/thread.js
@@ -17,12 +17,6 @@ registerClassPatchModel('mail.thread', 'im_livechat/static/src/models/thread/thr
      */
     convertData(data) {
         const data2 = this._super(data);
-        if ('last_message_id' in data) {
-            if (!data2.messagesAsServerChannel) {
-                data2.messagesAsServerChannel = [];
-            }
-            data2.messagesAsServerChannel.push(['insert', { id: data.last_message_id }]);
-        }
         if ('livechat_visitor' in data && data.livechat_visitor) {
             if (!data2.members) {
                 data2.members = [];