Issue #3520652: Add support for 'File URL' field type in 'entity_browser_file' Field widget

Closes #3520652

src/Plugin/Field/FieldWidget/FileBrowserWidget.php

@@ -21,6 +21,7 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  *   multiple_values = TRUE,
  *   field_types = {
  *     "file",
+ *     "file_url",
  *     "image"
  *   }
  * )