User Custom Actions Config Page - Responsive SP2013/2016
Refer to blog post regarding UCACP - 2016-03-10 update which enables installation of PnP SharePoint 2013/2016 Responsive UI
3 Files!
Use PnPResponsiveUI as ID
Injected Script Block
Injected Script (which finds and inserts the CSS too)
Responsive UI Screenshots
SharePoint 2013 On-Premises
SharePoint Online