title: bootstrap flex row heights to match
body: <p>Trying to make the cols in a row all match the same height with pure css, and no javascript. I have a solution that appears to work, until you start changing the number of cols in a row, or don't have a full row of cols. If you check out the bootply here: <a href="http://www.bootply.com/jZLRAiiEn7" rel="nofollow">http://www.bootply.com/jZLRAiiEn7</a> ... you can see it is working with col-md-3 ... but if you change them to col-md-6 ... strange things happen, like a col taking 100% width. Hoping a small change in the css is all I need to fix this.</p>