message: Add warning on debugger tour section in web
diff: @@ -622,11 +622,19 @@ impl<'a> Step {
  "Give it a shot! Check the following checkbox to be able to \
  see element boundaries.",
  ))
  - .push(Checkbox::new(
  + .push(if cfg!(target_arch = "wasm32") {
  + Element::new(
  + Text::new("Not available on web yet!")
  + .color([0.7, 0.7, 0.7])
  + .horizontal_alignment(HorizontalAlignment::Center),
  + )
  + } else {
  + Element::new(Checkbox::new(
  debug,
  "Explain layout",
  StepMessage::DebugToggled,
  ))
  + })
  .push(Text::new("Feel free to go back and take a look."))
  }
  