Print options slide toggle

[cbourget]

Please tell us about your environment:

69.0.3497.92

• Igo Version:
  latest

• Node:

10.9.0

According to this: https://material.io/design/components/selection-controls.html#switches

I think using slide toggles instead of checkboxes would be the preferred way to toggle the projection, scale and legend in the print tool.

The checkboxes don't feel particularly wrong so we could stick with them too.

[cbourget]

On a similar topic, I think the radio buttons to select the orientation should be replaced with a select field like we have in most browsers print tool.

[cbourget]

Overall, it would look like this mockup.