Create only one MarkseenMdnOnImap job even if message has multiple reports

All created jobs have the same parameters and move the same message,
so it does not make sense to create more than one.

src/mimeparser.rs

@@ -776,9 +776,8 @@ impl<'a> MimeMessage<'a> {
             return;
         }
 
-        for report in &self.reports {
             let mut mdn_recognized = false;
-
+        for report in &self.reports {
                 if let Some((chat_id, msg_id)) = message::mdn_from_ext(
                     self.context,
                     from_id,
@@ -788,6 +787,7 @@ impl<'a> MimeMessage<'a> {
                     self.context.call_cb(Event::MsgRead { chat_id, msg_id });
                     mdn_recognized = true;
                 }
+        }
 
             if self.has_chat_version() || mdn_recognized {
                 let mut param = Params::new();
@@ -798,7 +798,6 @@ impl<'a> MimeMessage<'a> {
                 }
                 job_add(self.context, Action::MarkseenMdnOnImap, 0, param, 0);
             }
-        }
     }
 }