saved-messages do not pop up in original chat in multi-device anymore

fix #2020

When forwarding a message, the original `in_reply_to` stays in place.
I did not find any recent commit that changed anything about this,
but IIRC there was a bug that prevented setting the `in_reply_to` at
all.

So, for chat messages, do not look at the InReplyTo header (and also not
at the References header)

src/dc_receive_imf.rs

@@ -1079,37 +1079,24 @@ async fn create_or_lookup_group(
         set_better_msg(mime_parser, &better_msg);
     }
 
-    let mut grpid = "".to_string();
+    let grpid = try_getting_grpid(mime_parser);
-    if let Some(optional_field) = mime_parser.get(HeaderDef::ChatGroupId) {
-        grpid = optional_field.clone();
-    }
 
     if grpid.is_empty() {
-        if let Some(extracted_grpid) = mime_parser
+        return create_or_lookup_adhoc_group(
-            .get(HeaderDef::MessageId)
+            context,
-            .and_then(|value| dc_extract_grpid_from_rfc724_mid(&value))
+            mime_parser,
-        {
+            allow_creation,
-            grpid = extracted_grpid.to_string();
+            create_blocked,
-        } else if let Some(extracted_grpid) = extract_grpid(mime_parser, HeaderDef::InReplyTo) {
+            from_id,
-            grpid = extracted_grpid.to_string();
+            to_ids,
-        } else if let Some(extracted_grpid) = extract_grpid(mime_parser, HeaderDef::References) {
+        )
-            grpid = extracted_grpid.to_string();
+        .await
-        } else {
+        .map_err(|err| {
-            return create_or_lookup_adhoc_group(
+            info!(context, "could not create adhoc-group: {:?}", err);
-                context,
+            err
-                mime_parser,
+        });
-                allow_creation,
-                create_blocked,
-                from_id,
-                to_ids,
-            )
-            .await
-            .map_err(|err| {
-                info!(context, "could not create adhoc-group: {:?}", err);
-                err
-            });
-        }
     }
+
     // now we have a grpid that is non-empty
     // but we might not know about this group
 
@@ -1378,6 +1365,27 @@ async fn create_or_lookup_group(
     Ok((chat_id, chat_id_blocked))
 }
 
+fn try_getting_grpid(mime_parser: &MimeMessage) -> String {
+    if let Some(optional_field) = mime_parser.get(HeaderDef::ChatGroupId) {
+        return optional_field.clone();
+    }
+
+    if let Some(extracted_grpid) = mime_parser
+        .get(HeaderDef::MessageId)
+        .and_then(|value| dc_extract_grpid_from_rfc724_mid(&value))
+    {
+        return extracted_grpid.to_string();
+    }
+    if !mime_parser.has_chat_version() {
+        if let Some(extracted_grpid) = extract_grpid(mime_parser, HeaderDef::InReplyTo) {
+            return extracted_grpid.to_string();
+        } else if let Some(extracted_grpid) = extract_grpid(mime_parser, HeaderDef::References) {
+            return extracted_grpid.to_string();
+        }
+    }
+    "".to_string()
+}
+
 /// try extract a grpid from a message-id list header value
 fn extract_grpid(mime_parser: &MimeMessage, headerdef: HeaderDef) -> Option<&str> {
     let header = mime_parser.get(headerdef)?;