New Assets UI | Option to disable it for users

[#1]

Request for Feature Enhancement (RFE) Summary:	Offer an option to disable the new Assets UI
Use-case:	Our users work in AEM and are used utilize the  AEM UI also to upload assets to AEM Assets Console. The new Assets UI should not be used as as e.g. important custom validation of file names or folders that we have implement as customizations are not effective.
Current/Experienced Behavior:	As new Assets UI is completely decoupled from AEM UI for Assets console, custom validations on file and folder names are not effective. Therefore unwanted file names and folder patterns are possible to create.
Improved/Expected Behavior:	We as a customer want to control if and when our users could see/use the new Assets UI.
Environment Details (AEM version/service pack, any other specifics if applicable):
Customer-name/Organization name:	Carl Zeiss AG
Screenshot (if applicable):
Code package (if applicable):