`image` widget does not render with SVG in Rack

[brylie]

When creating a Rack module with an SVG image widget, the image does not seem to render:

Steps to reproduce

1. create a new Rack module project
2. add an image widget
3. select the provided "res/CabbageRack.svg"
4. export the plugin
5. load it in Rack

[rorywalsh]

Right, that should be pretty simple to sort. Leave it with me.