anchor.diff:  
   Cms_Column_Table.prototype.removeTds = function () {
     var cellIndex = this.tableDom[0].cellIndex;
  -  var table = this.tableDom.parent().parent();
  -  for (var i = 0; i < table[0].rows.length; i++) {
  -    $(table[0].rows[i].cells[cellIndex]).remove();
  +  var thead = this.tableDom.parents('table').find('thead');
  +  var tbody = this.tableDom.parents('table').find('tbody');
  +  for (var i = 0; i < tbody[0].rows.length; i++) {
  +    $(tbody[0].rows[i].cells[cellIndex]).remove();
  +  }
  +  if (thead.length > 0) {
  +    for (var i = 0; i < thead[0].rows.length; i++) {
  +      $(thead[0].rows[i].cells[cellIndex]).remove();
  +    }
     }
   };
   
  
positive.code: 
  Cms_Column_Table.prototype.appendLeft = function () {
    var cellIndex = this.tableDom[0].cellIndex - 1;
    var table = this.tableDom.parent().parent();
    this.removeControlTable();
    for (var i = 1; i < table[0].rows.length; i++) {
      if (table[0].rows[i].cells[cellIndex].tagName == "TH") {
        if (!table[0].rows[i + 1]) {
          alert("<%= I18n.t("cms.column_table.cant_append_left") %>");
          this.addControlTable();
          var tableMenu = $('.table-menu');
  
negative.code:         }
          return false;
        }
        $(tbody[0].rows[i].cells[cellIndex]).before("<th scope='" + tbody[0].rows[i].cells[cellIndex].scope + "'></th>");
      } else {
        $(tbody[0].rows[i].cells[cellIndex]).before("<td></td>");
      }
    }
    if (thead.length > 0) {
      for (var i = 0; i < thead[0].rows.length; i++) {
        if (thead[0].rows[i].cells[cellIndex].tagName == "TH") {
          if (!tbody[0].rows[i + 1]) {
            alert("<%= I18n.t("cms.column_table.cant_append_left") %>");
            this.addControlTable();
            var tableMenu = $('.table-menu');
            if (tableMenu.hasClass('show')) {
              tableMenu.removeClass('show');
            }
            return false;
          }
          if (tbody[0].rows[i + 1].cells[cellIndex].tagName == "TH") {
            alert("<%= I18n.t("cms.column_table.cant_append_left") %>");
            this.addControlTable();
            var tableMenu = $('.table-menu');
            if (tableMenu.hasClass('show')) {
              tableMenu.removeClass('show');
            }
            return false;
          }
          $(thead[0].rows[i].cells[cellIndex]).before("<th scope='" + thead[0].rows[i].cells[cellIndex].scope + "'></th>");
        } else {
          $(thead[0].rows[i].cells[cellIndex]).before("<td></td>");
        }
      }
    }
    this.addControlTable();
  