'foldercontents' Navigation Portlets already have a batching
capability, which goes through the dusty machinery primarily meant for
folder_contents (macros, slicing skins script etc).
It can be good tactics to make a content list page rely on a Content
Portlet, if basing it on a search makes senses. Besides, this is an
opportunity to bypass the above machinery and go for something more
straight, and Z3-style
