changed link to directly open the chat

lib/view/pages/talk/components/chatMessage.dart

@@ -2,12 +2,12 @@
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_linkify/flutter_linkify.dart';
-import 'package:url_launcher/url_launcher_string.dart';
 
 import '../../../../api/marianumcloud/talk/chat/getChatResponse.dart';
 import '../../../../api/marianumcloud/talk/chat/richObjectStringProcessor.dart';
 import '../../../../model/accountData.dart';
 import '../../../../model/endpointData.dart';
+import '../../../../utils/UrlOpener.dart';
 
 class ChatMessage {
   String originalMessage;
@@ -29,7 +29,7 @@ class ChatMessage {
 
     var contentWidget = Linkify(
       text: content,
-      onOpen: onOpen,
+      onOpen: UrlOpener.onOpen,
     );
 
     if(originalData?['object']?.type == RichObjectStringObjectType.talkPoll) {
@@ -73,10 +73,4 @@ class ChatMessage {
         )
     );
   }
-
-  Future<void> onOpen(LinkableElement link) async {
-    if(await canLaunchUrlString(link.url)) {
-      await launchUrlString(link.url);
-    }
-  }
 }