[Bug] "Please select at least one layer to duplicate" - Modal keeps popping up
When I have Paddy enabled, this popup comes up whenever I click around in different parts of Sketch files. DIsabling the Paddy plugin makes the message go away. Not sure if a conflict with Paddy or another plugin (no idea what makes this popup come up in the first place). Is this part of Paddy?

![image](https://user-images.githubusercontent.com/28272783/36119825-1225ae70-0ff6-11e8-8654-fb947b05223d.png)


