Send to menu fix

Closes #846 

@jvine `Send to`  menu was partially hidden by floating side nav. So, had to remove side nav's right margin in smaller screens (refer screenshot). 

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![ios simulator screen shot sep 5 2014 4 47 04 am](https://cloud.githubusercontent.com/assets/302258/4164287/fb76e586-34f2-11e4-8810-c3194a86f89f.png)