Remove bottom margin for better warning blocks display

[Jerome-Herbinet]

This CSS change removes the extra bottom padding (which is in fact a paragraph bottom margin).
It makes text more compact, which is IMO relevant because warning blocks aim to be compact.

🏚️ Before

🏡 After

Fixes: nextcloud/collectives#1175

🏁 Checklist

• Code is properly formatted (npm run lint / npm run stylelint / composer run cs:check)
• Sign-off message is added to all commits

[juliusknorr]

Thanks for the contribution. Small comment inside as I think the rule is applying to widely.

[Jerome-Herbinet]

@juliushaertl please check my new commit (old and new commit have been squashed)

[Jerome-Herbinet]

Testing by your side is welcome

[juliusknorr]

We should still only do this for the last p element within a callout and please move this style to the actual callout vue component linked earlier

[Jerome-Herbinet]

I'm sorry @juliushaertl, but what is the actual linked callout vue component you're talking about ?

[mejo-]

@Jerome-Herbinet https://github.com/nextcloud/text/blob/main/src/nodes/CodeBlockView.vue is the component @juliushaertl is talking about.

See the <style> block at the end of this file. There you can overwrite the behaviour for p .paragraph-content, but as @juliushaertl said it should only be done if it's the last p element.

[Jerome-Herbinet]

Thanks for your answer @mejo- but there is no p .paragraph-content css property to overwrite in https://github.com/nextcloud/text/blob/main/src/nodes/CodeBlockView.vue <style> block 🤔

[mejo-]

Turned out Callout.vue already had a rule to remove margin-bottom for the last child, but it was broken. I took the liberty to push a fix for this.

[mejo-]

/backport to stable28

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