Add absent <thead> tags

[paul-man]

Signed-off-by: Paul Mannarino paul.mannarino@gmail.com

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What does this PR aim to accomplish?:

Resolve #1378
Regain my honor for abandoning #1397

How does this PR accomplish the above?:

Utilize for header rows in all tables

What documentation changes (if any) are needed to support this PR?:

None

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I tried to reopen my previous PR but it seems I don't have permission to do so. Apologies for the PR clutter and for never following up on #1397 :/

@XhmikosR To answer your question on my old PR, it appears the only place a <thead> is being generated by javascript is for the custom tooltips. In that case my code change shouldn't be double adding any <thead>.

cc: @PromoFaux

[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-v5-12-web-v5-9-and-core-v5-7-released/51795/1