Improvments to XE's dynamic table view

This issue is a root issue that will refer as sub-tasks to several improvements to be made on the dynamic grid view bundled in XWiki Enterprise.

The grid view is currently used in XE by the following features:

• All Documents table
• All Attachments table
• Lists of users and groups in the administration UI
• Lists of rights in the administration UI

It is also used by custom applications.