message: Set min slider to step 0.1 seconds.
diff: @@ -649,7 +649,7 @@ static HTML_CANVAS: &str = r#"
  <td><label for="scale">Scale:</label></td>
  </tr>
  <tr>
  - <td><input type="range" min="0" max="30" value="0" id="min-unit-time"></td>
  + <td><input type="range" min="0" max="30" step="0.1" value="0" id="min-unit-time"></td>
  <td><input type="range" min="1" max="50" value="20" id="scale"></td>
  </tr>
  <tr>
  