add interactive process for selecting a predicted population before applying selection index..
wrap prediction populations list in a div block..
added a method for finding selection populations with already predicted GEBVs for traits..
call js function to select a prediction population before applying selection index, added div elements, and styling of selectable list display..
changed button wording..
moved css stuff to solgs css file..
misc solgs-specific custom css..
use the new solgs css file..
flot.css is now solgs.css