Fix datasrouce first selector
Fix datasrouce first selector

tagyangyang/jsonform,joshfire/jsonform,widgetworks/jsonform,globocom/jsonform,iainbeeston/jsonform,joshfire/jsonform,ulion/jsonform,imkevinyang/jsonform,imkevinyang/jsonform,suricactus/jsonform,yklykl530/jsonform,ulion/jsonform,widgetworks/jsonform,nishant8BITS/jsonform,jsonform/jsonform,jsonform/jsonform,capriza/jsonform,globocom/jsonform,capriza/jsonform,tagyangyang/jsonform,suricactus/jsonform,mrthan/jsonform-rails,nishant8BITS/jsonform