Make "include only collection resources" more prominent

[dietervu]

Both Henk and Darja indicated that the results in the VLO are often overshadowed by records located in the lower sections of the CMDI hierarchy (e.g. "sessions" in speech corpora). There is the Only include collection resources option that can be enabled to address this, but it is hidden (under Search Options) and disabled by default. Would be good to rethink this and maybe do the filtering the other way: by default enable this option and offer to extend the search at the bottom of the result list.

[HenkvdHeuvel]

Yes I think it is better to do enable this collection option by default

[twagoo]

One idea that comes to mind in terms of how to present this to the user is have a selector (tabs, dropdown, toggle...) in the search results area, I imagine on top, to switch between Collection results | All results. I would like to be able to add Non-collection results but we have a precision issue, as it is hard to automatically determine whether a metadata record represents a collection. We may also need a more precise definition of what we consider to be a collection.