Separate Media Folder for File and Images Widget

[mateuswetah]

Is your feature request related to a problem? Please describe.
I know there is a lot of discussion regarding folder organization of media files (#513, #1046, #1472)... But the solution that people have been proposing of having media folders relative to collections may not be enough. I some cases you may want widget-level folder structure.

Describe the solution you'd like
I would like to be able to configure images and file widgets with different folders. The reason for that is that I want to put my images on an Assets folder, that is handled every time by optimization scripts, and the rest of the files, such as PDFs, could go on a Static folder.

Describe alternatives you've considered
I might be choosing the harder path here, maybe it should be on Webpack's shoulder to deal with the necessary image file types and the rest could be ignored... Also, I have just received this recomendation.

[jeromecoupe]

For most of my projects, a single folder for all assets / images is what is keeping me from going fully git-based. I think that the widget level approach might be a good one. I am no React dev but here are my 2 cents:

• keep media_folder and public_folder as general config option so we keep one central location for all assets
• allow media_subfolder_path and media_subfolder_url as config options per file or image widget that would be concatenated with the general config options

That would

• preserve the current behaviour
• keep everything in a centralised location which is easier to browse and make sense of for users
• give developers a lot more flexibility.

[erezrokah]

Should be fixed with #3208