block_refresh.css in Block Refresh 5

/* Animated throbber */
html.js .block-refresh-button {
  background-image: url(throbber.gif);
  background-repeat: no-repeat;
  background-position: 100% 2px;
  float: right;
}

html.js .block-refresh-button a {
/*   margin-left: -9000px; */
}

html.js .block-refresh-button-throbbing {
  background-position: 100% -18px;
}

html.js .block-refresh-hidden {
  display: none;
}