Update app.py

app.py

@@ -490,7 +490,7 @@ class GradioChatApp:
                             llm_rerank = gr.Radio(choices=["True", "False"], value="True", interactive=True, label="LLM Re-rank (May override sorting)", scale=2)
                         with gr.Row():
                             num_papers = gr.Slider(minimum=1, maximum=10, value=4, step=1, interactive=True, label="Cite # papers",scale=1)
-                            sort_by = gr.Dropdown(["Relevance", "Citations", "Year"], value="Relevance", interactive=True,  label="Sort by", scale=2) # scale=1, min_width=0                        
+                            sort_by = gr.Dropdown(["Relevance", "Citations", "Year"], value="Citations", interactive=True,  label="Sort by", scale=2) # scale=1, min_width=0                        
                         with gr.Row():
                             temperature = gr.Slider(minimum=0.0, maximum=1.0, value=0.2, step=0.1, interactive=True, label="Temperature", scale=1)
                             max_tokens = gr.Slider(minimum=0, maximum=3000, value=500, step=64, interactive=True, label="Max output tokens", scale=2)