Add a modal id prop on the delete modal component

[loic425]

Needed for my WIP work at Jolicode.

{{ component('sylius_bootstrap_admin_ui:delete_modal', {
    id: directory, 
    modal_id: 'delete-directory-modal-' ~ loop.index , 
    path: path('joli_media_sylius_admin_delete_directory', {'key': directory})
}) }}

Here my path is a directory label, so it could contains any characters.