Bug/2391 set style with document fragment parent (#2392)

* [#2391] fix error in setStyle for Bootstrap 3 when parentNode is a document fragment

* [#2391] invoke buildData() before render() in refresh() to align order with init()

Author: Mobe91

js/bootstrap-select.js

@@ -1790,7 +1790,7 @@
       if (version.major < 4) {
         newElement.classList.add('bs3');
 
-        if (newElement.parentNode.classList.contains('input-group') &&
+        if (newElement.parentNode.classList && newElement.parentNode.classList.contains('input-group') &&
             (newElement.previousElementSibling || newElement.nextElementSibling) &&
             (newElement.previousElementSibling || newElement.nextElementSibling).classList.contains('input-group-addon')
         ) {
@@ -2974,9 +2974,9 @@
       this.options = config;
 
       this.checkDisabled();
+      this.buildData();
       this.setStyle();
       this.render();
-      this.buildData();
       this.buildList();
       this.setWidth();