Change wording of status when blocking is disabled

[yubiuser]

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• I have made only one major change in my proposed changes.
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What does this PR aim to accomplish?:

When FTL is running, but blocking disabled, the status panel showed "offline". But this is ambiguous: Is FTL offline (hence no DNS resolution at all) or is only the blocking function diabled/offline?

This PR changes the wording to be more clear: only the blocking is disabled.

[pralor-bot]

This pull request has been mentioned on Pi-hole Userspace. There might be relevant details there:

https://discourse.pi-hole.net/t/pi-hole-ftl-v5-15-web-v5-12-and-core-v5-10-released/54987/1