Fix y-axis label for 2D plots
Fix y-axis label for 2D plots

Review: da39a3ee5e6b4b0d3255bfef95601890afd80709@joshmutus

labrad/scalabrad-web,labrad/scalabrad-web,labrad/scalabrad-web,labrad/scalabrad-web,labrad/scalabrad-web