Adjust catalog for uniformity/mobile

I made some changes to the layout of the catalog in order to make it appear more consistent while allowing more threads to be visible. The changes were minuscule but phone viewing seems to be a little better, though I'm a little interested in making a mobile version of the site for users with screens <768px.

Let me know what you think of the changes, as they can be re-purposed to be only for the mobile version of the site if needed.

http://a.pomf.se/watxml.png