Make comment field optional on experiment feature conditions
Make comment field optional on experiment feature conditions

lmorchard/idea-town-server,6a68/testpilot,mathjazz/testpilot,lmorchard/idea-town,flodolo/testpilot,mathjazz/testpilot,mathjazz/testpilot,lmorchard/idea-town,meandavejustice/testpilot,lmorchard/idea-town,mozilla/testpilot,clouserw/testpilot,fzzzy/testpilot,clouserw/testpilot,dannycoates/testpilot,mozilla/testpilot,mozilla/idea-town-server,mozilla/idea-town,clouserw/testpilot,meandavejustice/testpilot,mozilla/idea-town-server,chuckharmston/testpilot,6a68/testpilot,lmorchard/idea-town-server,mozilla/idea-town,mozilla/idea-town-server,lmorchard/idea-town,lmorchard/testpilot,flodolo/testpilot,chuckharmston/testpilot,fzzzy/testpilot,ckprice/testpilot,meandavejustice/testpilot,flodolo/testpilot,chuckharmston/testpilot,chuckharmston/testpilot,mozilla/idea-town,mozilla/testpilot,clouserw/testpilot,lmorchard/idea-town-server,fzzzy/testpilot,flodolo/testpilot,6a68/testpilot,6a68/idea-town,lmorchard/testpilot,ckprice/testpilot,meandavejustice/testpilot,dannycoates/testpilot,fzzzy/testpilot,dannycoates/testpilot,6a68/testpilot,mathjazz/testpilot,mozilla/idea-town,lmorchard/testpilot,6a68/idea-town,ckprice/testpilot,lmorchard/testpilot,lmorchard/idea-town-server,ckprice/testpilot,mozilla/testpilot,dannycoates/testpilot,mozilla/idea-town-server,6a68/idea-town,6a68/idea-town