修复列表多个分组按钮显示优化

public/assets/js/require-table.js

@@ -992,7 +992,7 @@ define(['jquery', 'bootstrap', 'moment', 'moment/locale/zh-cn', 'bootstrap-table
                     $.each(dropdowns, function (i, j) {
                         dropdownHtml.push('<div class="btn-group"><button type="button" class="btn btn-primary dropdown-toggle btn-xs" data-toggle="dropdown">' + i + '</button><button type="button" class="btn btn-primary dropdown-toggle btn-xs" data-toggle="dropdown"><span class="caret"></span></button><ul class="dropdown-menu dropdown-menu-right"><li>' + j.join('</li><li>') + '</li></ul></div>');
                     });
-                    html.unshift(dropdownHtml);
+                    html.unshift(dropdownHtml.join(' '));
                 }
                 return html.join(' ');
             },