In past, it was opt-out via redirect opt-out per hostname.
This changes default behavior and disables redirect of DNSLink websites
to local gateway, as noted in
#701

Adds DNSLink section to Preferences screen.

Closes #701, #667

This adds new item to Active Tab section of menu in browser action
that enables user to open existing IPFS resource at Public or Custom
Gateway (depends on redirect status).

This removes "Redirect on {fqdn}" menu item from browser action menu.
DNSLink redirect is no longer enabled by default, and this feature does
not need to be present at all times (It remains on Preferences screen if
needed).

In the future we will change it to "Disaple IPFS integrations on these
hostnames"

Part of #741