Add show message id if display_name null

mail_improved_tracking_value/models/__init__.py

@@ -2,3 +2,4 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
 from . import mail_tracking_value
+from . import mail_message

mail_improved_tracking_value/models/mail_message.py

@@ -0,0 +1,19 @@
+from odoo import api, models
+
+
+class MailMessage(models.Model):
+    _inherit = "mail.message"
+
+    @api.model
+    def name_get(self):
+        res = super(MailMessage, self).name_get()
+        params = self.env.context.get("params")
+        if params:
+            model = params.get("model")
+            view_type = params.get("view_type")
+            if model == "mail.tracking.value" and view_type == "form":
+                for rec in res:
+                    if rec[1] == "False":
+                        new_name = (rec[0], "Message ID - " + str(rec[0]))
+                        res[res.index(rec)] = new_name
+        return res