Give URLs that are on one line more room
Give URLs that are on one line more room

20em turned out to be too short for a lot of URLs. Plus, we have the
horizontal space available to make these wider, so I don't see any
problem in doing so. This should make the app a little easier to use.

Change-Id: Ie8378709471d2616d90372ce9bdfedeb85142abe

diffux/diffux,diffux/diffux,kalw/diffux,kalw/diffux,kalw/diffux,diffux/diffux