web: add scroll to top button and squelch some debug logging

web/src/state.rs

@@ -511,13 +511,6 @@ pub fn update(msg: Msg, model: &mut Model, orders: &mut impl Orders<Msg>) {
                     .value_of();
 
                 let r = el.get_bounding_client_rect();
-                info!(
-                    "window scrolled {}x{}@{},{}",
-                    r.width(),
-                    r.height(),
-                    r.x(),
-                    r.y(),
-                );
                 let end = r.height() - ih;
                 let y = -r.y();
                 orders.send_msg(Msg::SetProgress((y / end).max(0.)));