[HOLD][#53420683] Update the "Change Password" page of the knowledge base.

Relies on https://github.com/AllPlayers/brochure.allplayers.com/pull/129.

![1](https://f.cloud.github.com/assets/2251119/1484590/f4f21cfe-4708-11e3-9e52-821730e04fc6.png)