TPAC: Streamline facet display

TPAC: Streamline facet display

Rather than including a DIV containing only a non-breaking space to
clear the lines of the facets, just use CSS to clear each facet and set
a bottom margin appropriately.

Also, take advantage of wide screens by allowing facets to display
more broadly rather than being limited to a 10% width of the screen.

Signed-off-by: Dan Scott <dscott@laurentian.ca>
Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>
Signed-off-by: Dan Wells <dbw2@calvin.edu>