fix messageinput autofocus

.vscode/launch.json

@@ -0,0 +1,19 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "stream-chat-flutter",
+            "request": "launch",
+            "type": "dart"
+        },
+        {
+            "name": "example",
+            "cwd": "example",
+            "request": "launch",
+            "type": "dart"
+        }
+    ]
+}

lib/src/message_input.dart

@@ -95,7 +95,7 @@ class MessageInput extends StatefulWidget {
     this.attachmentThumbnailBuilders,
     this.inputTextStyle,
     this.attachmentIconColor,
-    this.autofocus,
+    this.autofocus = false,
   }) : super(key: key);
 
   /// Message to edit
@@ -262,7 +262,7 @@ class MessageInputState extends State<MessageInput> {
             });
           },
           style: widget.inputTextStyle ?? Theme.of(context).textTheme.bodyText2,
-          autofocus: widget.autofocus ?? false,
+          autofocus: widget.autofocus,
           decoration: InputDecoration(
             hintText: 'Write a message',
             hintStyle: