Background image position
I'm using HTML-Sketchapp CLI and have this strange bug, where all images are consistently offset by almost 50px.

![image](https://user-images.githubusercontent.com/31395111/47951292-c9589a80-dfb2-11e8-9f32-3f01b61b94e2.png)

I'm using CSS background image.

Has anyone seen this before, or can provide any clues?
Is this aa HTML-Sketchapp or HTML-Sketchapp CLI issue?