appNGizer bulk operations for managing site properties

It would be nice to use some kind of bulk operation for appNG entities in appNGizer.

Example Properties:
Currently we must make a POST/PUT/DELETE request for each property we want to manage. In a development enviroment for a customer we have ten sites (~15 site properties) and in sum ~150 properties to manage. With a bulk operation, we could submit all properties of a site in one request, minimising the amount of requests to 15.