code: function focusToFirstTd(sq, range, $tr, tableMgr) {
    const nextFocusCell = $tr.find('td').get(0);
    range.setStart(nextFocusCell, 0);
    range.collapse(true);
  
    tableMgr.setLastCellNode(nextFocusCell);
    sq.setSelection(range);
  }
docs: Focus to first TD in given TR
  @param {SquireExt} sq Squire instance
  @param {Range} range Range object
  @param {jQuery} $tr jQuery wrapped TR
  @param {object} tableMgr Table manager