RD|BS: Allow the accordion to display images

If the accordion content contains an image, take this into consideration when calculating the overall content's height

- Haven't incremented the version number... sorry.

"Ahhh, refreshing"
![ibfoqbt169nmnw](https://cloud.githubusercontent.com/assets/3900160/2698022/21a41950-c3f5-11e3-889f-d3ba017b7fd3.gif)