fix: Correct context for Image Bubble

lib/widgets/event_content/image_bubble.dart

@@ -7,6 +7,7 @@ import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter_svg/flutter_svg.dart';
 
 import '../../utils/matrix_sdk_extensions.dart/event_extension.dart';
+import '../matrix.dart';
 
 class ImageBubble extends StatefulWidget {
   final Event event;
@@ -238,7 +239,7 @@ class _ImageBubbleState extends State<ImageBubble> {
         onTap: () {
           if (!widget.tapToView) return;
           showDialog(
-            context: context,
+            context: Matrix.of(context).navigatorContext,
             builder: (_) => ImageViewer(widget.event, onLoaded: () {
               // If the original file didn't load yet, we want to do that now.
               // This is so that the original file displays after going on the image viewer,