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

app.py

@@ -95,7 +95,7 @@ def init_leaderboard(dataframes):
         LEADERBOARD_DF = get_leaderboard_df(RESULTS_REPO)
         default_columns = [c.name for c in fields(AutoEvalColumn) if c.displayed_by_default]
         
-        return update_data(subset, None, default_columns), gr.Textbox(placeholder="🔍 Search Models... [press enter]", label="Filter Models by Name"), gr.CheckboxGroup(default_columns)
+        return update_data(subset, None, default_columns), gr.Textbox("", placeholder="🔍 Search Models... [press enter]", label="Filter Models by Name"), gr.CheckboxGroup(default_columns)
 
     def update_data(subset, search_term, selected_columns):
         print("Subset:", subset)