.progress-spinner {
    position: fixed;
    z-index: 1502;
    height: 2em;
    width: 2em;
    overflow: show;
    margin: auto;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}
/* Transparent Overlay */
.progress-spinner:before {
  content: '';
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.53);
}