lazy loading of facets for

[lukegorman]

No facet search for "creationTime" and "keywords" most of the time but allow facets when the user is directly interacting with the controls related to these two fields.

[stephan271]

Avoid the fields of "creationTime" and "keywords" by default to get better performance for facet queries. Do the missing facet call only when the user select the corresponding facet