message: fix(popup): remove white spaces
diff: @@ -125,6 +125,11 @@ body {
  font-family: "Helvetica Neue", Helvetica, Arial, "Hiragino Sans GB", "Hiragino Sans GB W3", "Microsoft YaHei UI", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  }
  +.frame-root {
  + // hide white spaces
  + font-size: 0;
  +}
  +
  .saladict-DictPanel {
  position: static;
  overflow: hidden;
  