Are you referring to any widget configuration (ex: mosaic, navigation list, activity story stream, etc)?
If so, I have not seen this OOTB, but this could be done with customizations - happy to discuss more on our next cadence call or within our community planning area
Or are you referring to the widget configuration within the back end (widget studio)?
If so I can not seem to find any OOTB fields that support that - but it would be possible to create a custom control to support that. In our tech teams opinion - the best way to implement it would to make use of Veint's storage system - which would involve a plugin. This could possibly be done without a plugin, but may have some downsides - happy to discuss with you on our next cadence call or within community planning.
Yes, url and urlList properties in widget configuration can support uploading via options on their default rendering. For example, for a url property, setting the allowLocal="true" option will allow uploading files. To the widget, the file will be provided from configuration by URL.
