Can update admin status of a user

lib/models/conversation.dart

@@ -66,6 +66,9 @@ class Conversation extends SerializableElement<Conversation> {
   /// Check if the last message has been seen or not
   bool get sawLastMessage => lastActivity <= membership.lastAccessTime;
 
+  /// Check out whether a conversation is managed or not
+  bool get isManaged => groupID != null;
+
   Conversation.fromJson(Map<String, dynamic> map)
       : id = map["id"],
         name = map["name"],