LP #1100914: Input focus for staff client portal should be the text box.

Suggested by a librarian:
Save a click by putting the initial focus of the Portal page in the search box.
Previously, entering the text box would eliminate the decorative background image;
now, pressing on any key while focus in the box will eliminate the text.

Signed-off-by: Dan Pearl <dpearl@cwmars.org>
Signed-off-by: Pasi Kallinen <pasi.kallinen@pttk.fi>
Signed-off-by: Ben Shum <bshum@biblio.org>