Issue #2282477 by tim.plunkett: Fixed ViewListBuilder::getDisplaysList() does not handle empty admin strings.

core/modules/views_ui/src/ViewListBuilder.php

@@ -229,7 +229,7 @@ class ViewListBuilder extends ConfigEntityListBuilder {
     $displays = array();
     foreach ($view->get('display') as $display) {
       $definition = $this->displayManager->getDefinition($display['display_plugin']);
-      if (isset($definition['admin'])) {
+      if (!empty($definition['admin'])) {
         // Cast the admin label to a string since it is an object.
         // @see \Drupal\Core\StringTranslation\TranslationWrapper
         $displays[] = (string) $definition['admin'];

core/modules/views_ui/tests/src/ViewListBuilderTest.php

@@ -54,6 +54,7 @@ class ViewListBuilderTest extends UnitTestCase {
             'title' => 'Master',
             'theme' => 'views_view',
             'no_ui' => TRUE,
+            'admin' => '',
           )
         ),
         array(