fix(baseline): checkmarks weren't reflecting mobile status

[LeoMcA]

Summary

Fixes #10997

Problem

We weren't taking mobile statuses into account when working out whether to display a checkmark next to a browser. For Safari we were only checking the safari key, we weren't also checking the safari_ios key, for instance.

Solution

Check both desktop and mobile keys for Chrome, Firefox and Safari.

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Screenshots

Before

After

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How did you test this change?

• yarn dev
• Visited http://localhost:3000/en-US/docs/Web/API/Fullscreen_API and a few other pages to verify checks/crosses worked as expected
• Looked at generated source to ensure titles and aria-lables were still being generated correctly, with no "[object Object]" strings within