Update browser button to reflect sitepolicy

[IAmThePan]

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Fact: You can set a Whitelist or Blacklist policy to have wildcards (*).
Question: What happens if you trust a site (vox.com) and restrict a wildcard (*.com) that conflicts?
Answer: According to getSitePolicy in src/classes/Policy.js we check and return the restrict criteria before the trust criteria. Therefore it will restrict the site. This is true even if we swap the trust/restrict policies.
Conclusion: That is all fine and I am not changing any of the above facts.

I am changing the Browser Button Blue/Grey status to reflect the site policy. Previously it only checked whether the site was on the Whitelist and not whether it was also on the Blacklist. I have fixed this so the Browser Button correctly represents the Site Policy (and doesn't show grey if there is both a trust and restrict policy for the site).