Don't change page template if there is no page template field, OR if the template is of type default, or not set

Fixes https://github.com/getgrav/grav-plugin-admin/issues/1059
Fixes https://github.com/getgrav/grav/issues/1403
Fixes https://github.com/getgrav/grav-plugin-admin/issues/1062

CHANGELOG.md

@@ -1,3 +1,9 @@
+# v1.3.3
+## 04/xx/2017
+
+1. [](#bugfix)
+    * Fix for regression introduced in the automatic page template switch when changing page parent [#1059](https://github.com/getgrav/grav-plugin-admin/issues/1059) [grav#1403](https://github.com/getgrav/grav/issues/1403) [#1062](https://github.com/getgrav/grav-plugin-admin/issues/1062)
+
 # v1.3.2
 ## 04/10/2017
 

classes/admincontroller.php

@@ -1362,7 +1362,8 @@ class AdminController extends AdminBaseController
 
         $this->admin->json_response = [
             'status'  => 'success',
-            'child_type' => 'default'
+            'child_type' => '',
+            'message' => $this->admin->translate('PLUGIN_ADMIN.NO_CHILD_TYPE')
         ];
 
         return true;

themes/grav/app/pages/page/add.js

@@ -50,12 +50,18 @@ $(document).on('change', '[name="data[route]"]', (event) => {
     const pageTemplate = $('[name="data[name]"]');
     const URI = `${config.base_url_relative}/ajax.json/task${config.param_sep}getChildTypes`;
 
+    if (pageTemplate.length === 0) {
+        return;
+    }
+
     request(URI, {
         method: 'post',
         body: { rawroute }
     }, (response) => {
-        const type = response.child_type || 'default';
+        const type = response.child_type;
+        if (type !== '' && type !== 'default') {
             pageTemplate.val(type);
             pageTemplate.data('selectize').setValue(type);
+        }
     });
 });