getCurrentBoardId() {
    let popupCardBoardId = Session.get('popupCardBoardId');
    let currentBoard = Session.get('currentBoard');
    let ret = currentBoard;
    if (popupCardBoardId) {
      ret = popupCardBoardId;
    }
    return ret;
  }
returns the current board id
<li> returns the current board id or the board id of the popup card if set