Consolidating css

moved css from tempcssforjoel and metoertest1 into main. Organized a
bit, still some messy places and things not grouped where they should
be yet.

Tried out a different layout for min/max on sell page, only did one of
the values for now. Not perfectly formatted, but I thought the layout
might be more compact and logical?

on the buy page, I started playing with a place to put the filters for
searching/filtering listings.