message: Fixes for loader in Chrome
diff: "#arena_frame.is-expanded{height:"+markletHeightExpanded+"px !important}" +
  "#arena_frame{z-index:9999999998;background:rgba(255,255,255,0.75);}" +
  "#arena_frame:hover{background:rgba(255,255,255,0.9);}" +
  - "#arena_div{z-index:9999999999;display:none;opacity:0}";
  + "#arena_div{z-index:9999999999;display:none;}";
  if (markletStyle.styleSheet) {
  markletStyle.styleSheet.cssText = markletCSS;
  