button.ui-dialog-titlebar-close::after {
  content: "";
  width: 14px;
  background: url('data:image/svg+xml;base64,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');
  background-size: cover;
  height: 14px;
  position: absolute;
  top: 1px;
  left: 1px;
  display: block;
}