improve empty search results page

[fbstj]

currently the page comes up with a small amount of 'there is no results' text which is somewhat swamped by the header and advanced search dialog (#33) and then is cramped upwards by the pagination bar which still shows (#32)

it should be more obviously and clearly demarked that there are no results

[burnhamaj]

Issue #32 was fixed and closed. Issue #33 would shrink the search form. So it seems like all this leaves is enlarging and maybe centering the text that says there are no results.