enter when editing cell in collection view does the right thing
enter when editing cell in collection view does the right thing

triggers blur

addresses #221

mcoenca/houston,jg3526/houston,gterrono/houston,jg3526/houston,mcoenca/houston,dgleba/houston,dgleba/houston,dgleba/houston,rclai/houston,rclai/houston,samcorcos/houston,jg3526/houston,gterrono/houston,mcoenca/houston,rclai/houston,samcorcos/houston,gterrono/houston,samcorcos/houston