Allow CMS Author to duplicate a page

See the diagram → in ✨ The status badge should indicate if there are changes to the page Active .

isNew is computed by this heuristic:

  private function contentEntityIsConsideredNew(string $current_entity_label, EntityTypeInterface $entity_type): bool {
    return $current_entity_label == ApiContentControllers::defaultTitle($entity_type);
  }

+

  public static function defaultTitle(EntityTypeInterface $entity_type): TranslatableMarkup {
    return new TranslatableMarkup('Untitled @singular_entity_type_label', ['@singular_entity_type_label' => $entity_type->getSingularLabel()]);
  }

Together, they mean that this code from this issue's MR:

 // Update title and status.
    $duplicate->set('title', $duplicate->label() . ' (Copy)');
    $duplicate->set('status', FALSE);

… will never result in isNew: true for duplicates.

That heuristic was introduced in ✨ The status badge should indicate if there are changes to the page Active 's BE MR. This MR will have to refine that heuristic.

Given @larowlan's work on 📌 Include the preview HTML in the layout controller payload Active , I think he's probably best positioned to review this.

@attilatilman that test is passing locally for me, so I think it might just be a random fail
I've merged origin/0.x and pushed to your branch

Looks good to me, gave it another review and a manual test

Assigning to @wim-leers for "The change requests must be completed or resolved."

Did the honors to merge this given that we had code owner approvals.

Seems like we missed an edge case here: 🐛 Page duplication in navigator results in blank title in editor panel Active .

Automatically closed - issue fixed for 2 weeks with no activity.