Add a Dynamic Item List Field type to make it easy to implement Master-Detail views

It would be very nice to add a new Field type in the AWM Palette (and in Object editor) to make it easy to implement Master-Details views and avoid the complex coding as show in this tutorial: http://platform.xwiki.org/xwiki/bin/view/DevGuide/MasterDetailTutorial

Note that TikiWiki supports this by default, see:
https://doc.tiki.org/Dynamic+items+list

Note that it should be implemented as a custom display.

Note that implementing it as an extension is not easy because the displayer would need to be a template (as explained at http://platform.xwiki.org/xwiki/bin/view/DevGuide/CreatingNewXClassPropertyTypes#HWriteadisplayerforthenewpropertytype) and EM will not allow an Extension to contribute templates.