Don't loose CKEditor focus when messing with media library

js/edit_plus/plugins/field-plugin-base.js

@@ -448,6 +448,9 @@ export class FieldPluginBase {
       '.edit-plus-focused',
       '#navigation-plus-right-sidebar',
       '.ck-body-wrapper',
+      // Ignore Drupal modals
+      '#drupal-modal',
+      '.ui-dialog-buttonpane',
     ];
   }