add disease category as tab in search results

[tgbugs]

Clinical users come to KS and they have a disease oriented perspective. It would be good to have a panel on the front page for Diseases/Disorders or something like that. Also NINDS disease list would be a good thing to have mapped into the ontology if it is not already.

[tgbugs]

https://www.ninds.nih.gov/Disorders/all-disorders

[jgrethe]

The NINDS page also has a Knowledge Space feel to it. For example, for different types (e.g. disease) we may want different panels showing up in KS (e.g. Clinical Trials for diseases / drugs).

[tgbugs]

Add this as a category as a tab on the entity search results page.