Fix slice state not staying same on refresh bug.
Fix slice state not staying same on refresh bug.

Sending wrong number of parameters to save_state() function,
sending "slices" instead of "slice".

tcmitchell/geni-portal,tcmitchell/geni-portal,charliemeyer/geni-portal,tcmitchell/geni-portal,tcmitchell/geni-portal,charliemeyer/geni-portal,charliemeyer/geni-portal,charliemeyer/geni-portal,tcmitchell/geni-portal,charliemeyer/geni-portal