preview-hidden-comments even if reason is missing

[Katsute]

Closes #6098

• Write label only if reason exists
• Write comment in all cases (previously would only write if a reason existed)
• Keep comment hidden if disruptive or spam (only if reason exists)

Test URLs

#3647

refined-github/sandbox#47

Screenshot

Comment with missing reason:

Before	After

Comment with reason:

Before	After

[fregante]

Thank you for the PR! The condition should be kept because we still don't want to show the message when we know it's spam. So it should be something like:

const header = h.textContent;
const reason = currentRegex.exec(header)
if (!reason || !header)
  return

[Katsute]

Restored behavior where spam and abuse would be hidden (only if reason exists).

	const hide = /disruptive|spam/.exec(hiddenCommentHeader.textContent!)?.[0];
	if (hide) {
		return;
	}

I wasn't able to hide spam and abuse in the first case because there is no reason and no other way to differentiate between spam and non-spam hidden comments. 😥