Equal height cells

**Test case:** http://codepen.io/illycz/pen/yMEvoG

How to make all cells equal height?
I tried solutions with gallerySize true and false too, but I can't figure it out.

A need solution which working in responsive fluid layout...
I also change number of "visible" cells.

Thanks

Start by reproducing the provided CodePen test case and reading Flickity's options related to gallerySize and the number of visible cells. Compare the behavior in a responsive fluid layout as the visible-cell count changes. Done means the cells remain equal in height across the requested responsive configurations.

Written by the indexing model from the issue text.