make username next to timestamp opt-in

lib/src/message_list_view.dart

@@ -61,6 +61,7 @@ class MessageListView extends StatefulWidget {
     this.parentMessage,
     this.threadBuilder,
     this.onThreadTap,
+    this.showOtherMessageUsername = false,
   }) : super(key: key);
 
   /// Function used to build a custom message widget
@@ -79,6 +80,9 @@ class MessageListView extends StatefulWidget {
   /// Parent message in case of a thread
   final Message parentMessage;
 
+  /// If true show the other users username next to the timestamp of the message
+  final bool showOtherMessageUsername;
+
   @override
   _MessageListViewState createState() => _MessageListViewState();
 }
@@ -193,6 +197,7 @@ class _MessageListViewState extends State<MessageListView> {
               message: message,
               nextMessage: nextMessage,
               onThreadTap: _onThreadTap,
+              showOtherMessageUsername: widget.showOtherMessageUsername,
             );
           },
           childCount: _messages.length + 2,