Created conversation route

lib/ui/tiles/conversation_tile.dart

@@ -9,14 +9,21 @@ import 'package:flutter/material.dart';
 ///
 /// @author Pierre HUBERT
 
+typedef OpenConversationCallback = void Function(Conversation);
+
 class ConversationTile extends StatelessWidget {
   final Conversation conversation;
   final UsersList usersList;
+  final OpenConversationCallback onOpen;
 
   const ConversationTile(
-      {Key key, @required this.conversation, @required this.usersList})
+      {Key key,
+      @required this.conversation,
+      @required this.usersList,
+      @required this.onOpen})
       : assert(conversation != null),
         assert(usersList != null),
+        assert(onOpen != null),
         super(key: key);
 
   _buildSubInformation(IconData icon, String content) {
@@ -35,6 +42,7 @@ class ConversationTile extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return ListTile(
+      onTap: () => onOpen(conversation),
       // Conversation name
       title: Text(
         ConversationsHelper.getConversationName(