Edited common reaction emojis, display user avatar in reaction overview

lib/widget/userAvatar.dart

@@ -0,0 +1,20 @@
+import 'package:flutter/material.dart';
+
+import '../model/endpointData.dart';
+
+class UserAvatar extends StatelessWidget {
+  final String username;
+  final bool isGroup;
+  const UserAvatar({required this.username, this.isGroup = false, super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return CircleAvatar(
+      foregroundImage: !isGroup ? Image.network("https://${EndpointData().nextcloud().full()}/avatar/$username/128").image : null,
+      backgroundColor: Theme.of(context).primaryColor,
+      foregroundColor: Colors.white,
+      onForegroundImageError: !isGroup ? (o, t) {} : null,
+      child: isGroup ? const Icon(Icons.group) : const Icon(Icons.person),
+    );
+  }
+}