New Web Client Configuration

Hi All, 

Has anyone had any success modifying the look/theme of the new web client? I saw a post referencing the possibility of doing via updating the JSON files (see below). I'm working with a customer and they would like the new web client to present in a 'no frills' way ie. No search bar, breadcrumbs and even hiding the metadata card and preview tabs (opening the document via double click only) and just showing specific documents in a view.

https://community.m-files.com/forums-1552881334/f/m-files-api/5353/customizing-new-web-client

Any ideas?