message: stop the horizontal scroll bar of WebView to ficker
diff: @@ -155,7 +155,7 @@ export class Viewer {
  }, 100);
  }
  </script>
  - <div id="tmp00" style="visibility: hidden; width: 1px;"></div>
  + <div id="tmp00" style="visibility: hidden; width: 1px; overflow: scroll;"></div>
  <span id="colorpick" style="color: var(--color); background: var(--vscode-editorHoverWidget-background)"></span>
  </body></html>
  `
  