Make colors in diffviewer more subtle

Review Request #26 — Created May 23, 2007 and submitted


Review Board SVN (deprecated)


One of the comments that Juan made on his first look at
reviewboard was that the colors in our diff viewer were
a bit too heavy.  This basically adds gradient backgrounds
to the tops of change sections that fade to a much lighter
color, making large blocks less fatiguing to read.

  1. Not 100% sure what I think yet, but it's probably a step in the right direction. Looking forward to playing around with it to see how well it works.