Update submit button dropdown style (#1900)

main.py

@@ -112,12 +112,12 @@ def main():
                 with gr.Accordion("输入区", open=True, elem_id="input-panel") as area_input_primary:
                     with gr.Row():
                         txt = gr.Textbox(show_label=False, placeholder="Input question here.", elem_id='user_input_main').style(container=False)
-                    with gr.Row():
+                    with gr.Row(elem_id="gpt-submit-row"):
                         multiplex_submit_btn = gr.Button("提交", elem_id="elem_submit_visible", variant="primary")
                         multiplex_sel = gr.Dropdown(
                             choices=["常规对话", "多模型对话", "智能上下文", "智能召回 RAG"], value="常规对话",
                             interactive=True, label='', show_label=False,
-                            elem_classes='normal_mut_select').style(container=False)
+                            elem_classes='normal_mut_select', elem_id="gpt-submit-dropdown").style(container=False)
                         submit_btn = gr.Button("提交", elem_id="elem_submit", variant="primary", visible=False)
                     with gr.Row():
                         resetBtn = gr.Button("重置", elem_id="elem_reset", variant="secondary"); resetBtn.style(size="sm")