[IMP] mail: needactions and messages read

Mainly concern the client action:
	- Display needactions per channels
	- For all channels except Inbox, clear needactions when opening the channel
	- Add snackbar to undo needactions clearing
	- Display a separator between read and unread messages in threads
	- Fix active channel (for Inbox and Starred) display in sidebar

Various minor changes in chat_manager:
	- Code refactoring of bus notification handler
	- get_channel() don't fallback anymore on first channel

1 files changed, 13 insertions, 0 deletions

diff --git a/addons/mail/static/src/less/thread.less b/addons/mail/static/src/less/thread.less
index bcb73d4dd7c..df865d14a4f 100644
--- a/addons/mail/static/src/less/thread.less
+++ b/addons/mail/static/src/less/thread.less
@@ -22,6 +22,19 @@
         }
     }
 
+    .o_thread_new_messages_separator {
+        border-bottom: solid lighten(@odoo-brand-primary, 15%) 1px;
+        text-align: right;
+        .o_thread_separator_label {
+            position: relative;
+            top: 8px;
+            padding: 0 10px;
+            background: white;
+            color: lighten(@odoo-brand-primary, 15%);
+            font-size: smaller;
+        }
+    }
+
     .o_thread_message {
         .o-flex-display();
         padding: 4px 0;