Support for Base64 content from object

[Chris-Karona]

When working with Native, it is normal to generate images in Base64 format (e.g. Signatures) and store this Base64 encoded image in a String attribute. It would be good to be able to display these Base64 images in the web UI without having to convert to a File. As far as I can see this widget only works with remote content. Could it be made to display content directly from an object?