MAGETWO-64644: CMS Pages get removed from Store Hierarchy when saved

Author: sevos1984

app/code/Magento/Ui/view/base/web/js/form/components/fieldset.js

@@ -22,6 +22,7 @@ define([
             opened: false,
             level: 0,
             visible: true,
+            initializeFieldsetDataByDefault: false,
             disabled: false,
             listens: {
                 'opened': 'onVisibilityChange'
@@ -80,7 +81,7 @@ define([
                 'loading':  this.onContentLoading,
                 'error':  this.onChildrenError
             });
-
+            this._wasOpened = true;
             if (this.disabled) {
                 try {
                     elem.disabled(true);

app/code/Magento/Ui/view/base/web/templates/form/fieldset.html

@@ -46,7 +46,7 @@
     <div class="admin__fieldset-wrapper-content"
          css="'admin__collapsible-content': collapsible, '_show': opened, '_hide': !opened()">
         <fieldset
-                if="opened() || _wasOpened"
+                if="opened() || _wasOpened || initializeFieldsetDataByDefault"
                 class="admin__fieldset"
                 each="data: elems, as: 'element'" render=""/>
     </div>