Unfortunately, not. Removing it and setting `style="width:auto"` makes it look like 
![screen shot 2013-11-08 at 12 04 50](https://f.cloud.github.com/assets/831043/1500139/5c8d8a2c-486e-11e3-9b1e-037ab1025abd.png)

You can set the `width` to 70% say but that just makes it fixed width essentially, relative to the frame.