useModal flag

[aleixq]

Hi and thank you for your job. I am planning to use this filepicker in a drupal module to be able to pick files from nextcloud, the call to open filepicker is from a modal so it will come as this: A form with a button to show a modal and here filepicker component will be attached, so with the actual behavior it shows a new modal.
It will be great to let user choose between modal or regular div in the options.