Use grid-input-span mixin for input spans
Use grid-input-span mixin for input spans

see corresponding bootstrap mixin:
https://github.com/twitter/bootstrap/blob/master/less/mixins.less#L656

insight-meditation-center/imc-bootstrap-sass,insight-meditation-center/imc-bootstrap-sass,insight-meditation-center/imc-bootstrap-sass,insight-meditation-center/imc-bootstrap-sass