fixed poor loading on search help #422

Render page contenst first and then load the fields data since that was
holding up the page load.

Indexing _id as `uuid` in field index so you can search for
`uuid:10366976d62ab9a31257b2fad16113ee` now and it shows up in avaialble
fields index.  For some reason I think underscore prefixed fields do
show up in fields listing on Lucene for some reason.

Add some padding to botton/top and headers on the search help page.