added customisation options for attachment actions modal and related widgets

packages/stream_chat_flutter/lib/src/full_screen_media.dart

@@ -33,6 +33,10 @@ class FullScreenMedia extends StatefulWidget {
     this.startIndex = 0,
     String? userName,
     this.onShowMessage,
+    this.showReply = true,
+    this.showShowInChat = true,
+    this.showSave = true,
+    this.showDelete = true,
   })  : userName = userName ?? '',
         super(key: key);
 
@@ -51,6 +55,18 @@ class FullScreenMedia extends StatefulWidget {
   /// Callback for when show message is tapped
   final ShowMessageCallback? onShowMessage;
 
+  /// Show reply option
+  final bool showReply;
+
+  /// Show show in chat option
+  final bool showShowInChat;
+
+  /// Show save option
+  final bool showSave;
+
+  /// Show delete option
+  final bool showDelete;
+
   @override
   _FullScreenMediaState createState() => _FullScreenMediaState();
 }
@@ -196,6 +212,10 @@ class _FullScreenMediaState extends State<FullScreenMedia>
                         StreamChannel.of(context).channel,
                       );
                     },
+                    showReply: widget.showReply,
+                    showShowInChat: widget.showShowInChat,
+                    showSave: widget.showSave,
+                    showDelete: widget.showDelete,
                   ),
                   if (!widget.message.isEphemeral)
                     GalleryFooter(