Switch cross icon rendering

[julien-deramond]

Description

Here is the rendering of the switch when it's off:

Hovewer, the design seems to be different (source: https://app.zeplin.io/project/5db823dcd517762c27b3d72f/screen/5db82582e3284023b20bcf0d).

The icon image is not the same, and there's no padding around the image on the design specification while there seems to be one in our implementation.