Refactor init_leaderboard function to update data outputs to dataframe and improve dropdown UI

app.py

@@ -102,6 +102,7 @@ def init_leaderboard(dataframes):
         print("Search Term:", search_term)
         print("Selected Columns:", selected_columns)
         filtered_data = dataframes[subset][dataframes[subset]['Model Name'].str.contains(search_term, case=False)]
+        selected_columns = [c.name for c in fields(AutoEvalColumn) if c.name in selected_columns]
         selected_data = filtered_data[selected_columns]
         return gr.DataFrame(selected_data, type="pandas", datatype=[c.type for c in fields(AutoEvalColumn) if c.name in selected_columns])