Refactored the :include_blank-handler into own private method.
Refactored the :include_blank-handler into own private method.

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