Disabled icon feature processed anyway

Patch for composer usage.

Rebased MR and patch against 4.x / 4.0.0.

Note: it is currently not possible to select 4.x version in the issue metadata.

function menu_manipulator_menu_link_content_form_entity_builder($entity_type, EntityInterface $menu_link, &$form, FormStateInterface $form_state) {
  // Attach extra options to Menu Link Content entity.
  $menu_link_options = $menu_link->link->first()->options ?: [];
  $menu_link_options['icon'] = $form_state->getValue('menu_link_icon');

This prevent saving the icon with other module like ui_icons.

Patch for Composer usage.