New advanced search filter size/layout options

Allow setting the heights of the advanced search select boxes in
config.tt2. Also provide colspan and rowspan for adjusting the layout
of the filter boxes.

Signed-off-by: Pasi Kallinen <pasi.kallinen@pttk.fi>
Signed-off-by: Remington Steed <rjs7@calvin.edu>
Signed-off-by: Dan Wells <dbw2@calvin.edu>