Add logics on content view to handle aggregates show/hide

A Boolean should be added to the ContentView interface to know whether the aggregates filter view should be shown instead of the original filter view.

When not set, this boolean can default to the same criterion than "quick search" filter uses when showing the "clear filter" button, e.g. "search document model is dirty".
This boolean should also be explicitely set to handle the "reset" button logics (e.g. show the original filter view again).