message: Fix incorrect base URL on underlines
diff: @@ -382,7 +382,7 @@ function elmOffToSegOff(elmOff: IRangeInfo, span: HTMLSpanElement) {
  }
  let cachedCanvas: HTMLCanvasElement;
  -const baseURI = typeof document !== "undefined" ? document.baseURI : "";
  +const baseURI = typeof document !== "undefined" ? document.location.origin : "";
  let underlineStringURL = `url("${baseURI}/public/images/underline.gif") bottom repeat-x`;
  let underlinePaulStringURL = `url("${baseURI}/public/images/underline-paul.gif") bottom repeat-x`;
  let underlinePaulGrammarStringURL = `url("${baseURI}/public/images/underline-paulgrammar.gif") bottom repeat-x`;
  