diff layer/WaveformLayer.cpp @ 581:c9d6cf9c51c8 sv_v1.8

* Cut off column dialog if there are many columns -- allow user to ignore or take values from all columns past a certain number.
   This sort-of fixes #39, but it's problematic if some of the extraneous columns don't contain value data. We really want to handle the case where the final column is a label, at least.