Render fixes and a DAM file naming adjustment

This pull request features:

* `render text: "sometext"` is now usable
* `render layout: "special_layout"` is now used when set
* `render layout: false` is now usable

And a not render-related fix:

* Files from the DAM app are now named with a fingerprint instead of the uuid
This is intentionally as `converter.format` adds a dot.

Files looked like this before:
    default-b43f1a50470ba9b1eecb799aa81974b3-fef49643-296f-43c8-a6a7-2e34597915d5..jpg