cardLabelsPopup(event) {
    if (this.find('.js-card-label:hover')) {
      Popup.open("cardLabels")(event, {dataContextIfCurrentDataIsUndefined: this.currentData()});
    }
  }
opens the card label popup only if clicked onto a label
<li> this is necessary to have the data context of the minicard.
     if .js-card-label is used at click event, then only the data context of the label itself is available at this.currentData()