Fix read acknowledgement when topic filter is set

Signed-off-by: Lee Smet <lee.smet@hotmail.com>

CHANGELOG.md

@@ -20,6 +20,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - On unix based systems, the created key file is no longer readable system-wide.
 - The message subsystem no longer removes peeked message if a topic filter is set.
+- Properly send back a read acknowledgement after popping/peeking a message while
+  a topic filter is set.
 
 ### Deprecated
 

mycelium/src/message.rs

@@ -1338,7 +1338,14 @@ where
                         .enumerate()
                         .find(|(_, v)| &v.topic == topic)
                     {
-                        return inbox.complete_msges.remove(idx).unwrap();
+                        let msg = if pop {
+                            inbox.complete_msges.remove(idx).unwrap();
+                        } else {
+                            inbox.complete_msges[idx].clone();
+                        };
+
+                        self.notify_read(&msg);
+                        return msg;
                     } else {
                         break 'check;
                     }