[BUG] Can't select Paddy layer group
### Bug report

#### Actual behavior:

When i try to select the Paddy layer group from the artboard (not from layer list) it selects it for a one second and then deselects it. 

Problem occurs when Paddy group is nested inside another group.

![screenflow](https://user-images.githubusercontent.com/314302/36666730-cef8bbfa-1aeb-11e8-9b78-8bd070cab462.gif)


Paddy version: 1.0.4
Sketch version: 48.2
