Try to add decent error msg (doesnt work yet)

src/stock.rs

@@ -182,6 +182,9 @@ pub enum StockMessage {
 
     #[strum(props(fallback = "Message from %1$s"))]
     SubjectForNewContact = 73,
+
+    #[strum(props(fallback = "Failed to send message to %1$s. See 'info' for more details."))]
+    FailedSendingTo = 74,
 }
 
 /*