kliment/Printrun — pull request #199 by Chillance (2012-03-24 15:36:25+00:00)
Title: Minor updates to the graph functionality

Renamed Ex1 to Ex0 and Ex2 to Ex1 to better match what is said on RAMPS for instance.
Changed order to draw the target line first, and then the actual line so this line is shown above the target line.
Graying out graph when it's offline.