Better support for AJAX comments

[Zodiac1978]

Ongoing fixes for better AJAX comments support

See: https://wpdirectory.net/search/01HJKQW4Q7NCTKNB3W54CPARMZ

TODO: https://github.com/pluginkollektiv/antispam-bee/issues/149#issuecomment-1870265781

Fixes #149

[sonarqubecloud[bot]]

Quality Gate passed

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[stklcode]

This looks good to me, so I tend to merge it as is.

I'm not too deep into the inner logic right now, but I do not see this doing harm either, so one step into the right direction.

[Zodiac1978]

This is the first step to fix #149

There is another fix needed. https://github.com/pluginkollektiv/antispam-bee/issues/149#issuecomment-1870265781

But it would help to avoid unnecessary code execution for AJAX calls - but as this wouldn't make much sense without fixing the above this PR could wait until we fix the other problem.