Increase size of filter button container to prevent stacking
Increase size of filter button container to prevent stacking

This works on widths down to about 450px. At this size, the whole layout
of the page starts to fall apart starting with the header. I think that
this is the smallest we need to worry about and it looks pretty good
given the span sizes in this commit.

chop-dbhi/cilantro,chop-dbhi/cilantro,chop-dbhi/cilantro