update deleted message

lib/src/deleted_message.dart

@@ -1,25 +1,56 @@
 import 'package:flutter/material.dart';
 import 'package:stream_chat_flutter/src/stream_chat_theme.dart';
+import 'package:stream_chat_flutter/src/stream_svg_icon.dart';
 
 class DeletedMessage extends StatelessWidget {
   const DeletedMessage({
     Key key,
     @required this.messageTheme,
+    this.borderRadiusGeometry,
+    this.shape,
+    this.borderSide,
   }) : super(key: key);
 
+  /// The theme of the message
   final MessageTheme messageTheme;
 
+  /// The border radius of the message text
+  final BorderRadiusGeometry borderRadiusGeometry;
+
+  /// The shape of the message text
+  final ShapeBorder shape;
+
+  /// The borderside of the message text
+  final BorderSide borderSide;
+
   @override
   Widget build(BuildContext context) {
-    return Padding(
-      padding: const EdgeInsets.symmetric(vertical: 8.0),
-      child: Text(
-        'This message was deleted...',
-        style: messageTheme.messageText.copyWith(
-          fontStyle: FontStyle.italic,
-          color: Theme.of(context).brightness == Brightness.dark
-              ? Colors.white
-              : Colors.black,
+    return Material(
+      color: messageTheme.messageBackgroundColor,
+      shape: shape ??
+          RoundedRectangleBorder(
+            borderRadius: borderRadiusGeometry ?? BorderRadius.zero,
+            side: borderSide ??
+                BorderSide(
+                  color: Theme.of(context).brightness == Brightness.dark
+                      ? Colors.white.withAlpha(24)
+                      : Colors.black.withAlpha(24),
+                ),
+          ),
+      child: Padding(
+        padding: const EdgeInsets.symmetric(
+          vertical: 8.0,
+          horizontal: 16,
+        ),
+        child: Text(
+          'Message deleted',
+          style: messageTheme.messageText.copyWith(
+            fontStyle: FontStyle.italic,
+            color: (Theme.of(context).brightness == Brightness.dark
+                    ? Colors.white
+                    : Colors.black)
+                .withOpacity(.5),
+          ),
         ),
       ),
     );