add submit button

app.py

@@ -43,8 +43,9 @@ def clear_history(lang = "English"):
 with gr.Blocks(title="Ag GPT Demo") as demo:
     chatbot = gr.Chatbot()
     msg = gr.Textbox()
+    submit = gr.Button("Submit")
     clear = gr.Button("Clear")
-    msg.submit(user, [msg, chatbot], [msg, chatbot], queue=False).then(bot, chatbot, chatbot)
+    submit.click(user, [msg, chatbot], [msg, chatbot]).then(bot, chatbot, chatbot)
     clear.click(clear_history, None, chatbot, queue=False)