Add missing 'my messages' to message menu

misc/menu_template.in.hjson

@@ -2090,6 +2090,10 @@
                     value: { command: "S" }
                     action: @menu:messageSearch
                 }
+                {
+                    value: { command: "M" }
+                    action: @menu:myMessages
+                }
                 {
                     value: { command: "A" }
                     action: @menu:editAutoSignature
@@ -2237,6 +2241,14 @@
             }
         }
 
+        myMessages: {
+            desc: Personal Messages
+            module: my_messages
+            config: {
+                messageListMenu: messageAreaMyMessagesList
+            }
+        }
+
         messageAreaMyMessagesList: {
             desc: Personal Messages
             module: msg_list