auto update cols

app.py

@@ -181,6 +181,7 @@ w_clear_filters.on_click(clear_filters)
 w_group.param.watch(lambda e: search(), 'value')
 w_countries.param.watch(lambda e: search(), 'value')
 w_years.param.watch(lambda e: search(), 'value')
+w_columns.param.watch(lambda e: search(), 'value')
 
 # Allow pressing Enter in semantic query or keyword to trigger search
 w_semquery.param.watch(lambda e: search(), 'enter_pressed')