Support for linked axes


Hi there,

Thank you for your work on redash it is really awesome. I have a quick feature request that our analysts are asking for: linked plot axes in a dashboard. Most of our plot use time as the x-axis variable and oftentimes when we zoom in in one plot we want to be able to have all plots in the same dashboard zoom in to the same time range. Is that easy to do?

By the way if you want to point me to where this could be done in the code and a rough idea on how to do it, I would be happy to send a pull request on github.