IMPROVEMENT Convert multibyte URLs preview to human readable format

Before: 
![Screen Shot 2013-04-03 at 6 37 10 AM](https://f.cloud.github.com/assets/672794/326188/5669bedc-9b25-11e2-9159-a3482a400575.png)

After: 
![Screen Shot 2013-04-03 at 6 37 51 AM](https://f.cloud.github.com/assets/672794/326190/622cefb4-9b25-11e2-850f-6660f7cf7998.png)