code: function buildDropdown(items, trumbowyg) {
          var dropdown = [];
  
          $.each(items, function (i, item) {
              var btn = 'mention-' + i,
                  btnDef = {
                      hasIcon: false,
                      text: trumbowyg.o.plugins.mention.formatDropdownItem(item),
                      fn: function () {
                          trumbowyg.execCmd('insertHTML', trumbowyg.o.plugins.mention.formatResult(item));
  
                          return true;
                      }
                  };
  
              trumbowyg.addBtnDef(btn, btnDef);
              dropdown.push(btn);
          });
  
          return dropdown;
      }
docs: Build dropdown list
  
  @param {Array}   items      Items
  @param {object}  trumbowyg  Editor
  
  @return {Array}