add docs to SelectInput
add docs to SelectInput

EndingChaung/formtastic,ryanfox1985/formtastic,ryanfox1985/formtastic,mikz/formtastic,paulodiovani/formtastic,nishaya/formtastic,sideci-sample/sideci-sample-formtastic,thenthen8515/formtastic,thenthen8515/formtastic,ConferenceCloud/formtastic,ConferenceCloud/formtastic,EndingChaung/formtastic,Guestfolio/formtastic,Guestfolio/formtastic,Davidzhu001/formtastic,mikz/formtastic,justinfrench/formtastic,justinfrench/formtastic,ryanfox1985/formtastic,nishaya/formtastic,paulodiovani/formtastic,Davidzhu001/formtastic,justinfrench/formtastic