Align icons

[sh-csg]

🔀 Purpose of this PR:

• Fixes a bug

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📝 Description:

If you have enabled marking as helpful and as a solution at the same time, the icons are displayed side by side at the post and are not aligned to the upvote / downvote icons above them. The PR fixes this.

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📋 Checklist

Please confirm the following (check all that apply):

• Code passes the code checker without errors and warnings.
• Code passes the moodle-ci/cd pipeline on all supported Moodle versions or the ones the plugin supports.
• Code does not have var_dump() or var_export or any other debugging statements (or commented out code) that
  should not appear on the productive branch.

[TamaroWalter]

In my opinion it's better that the icons are visually placed differently than the up/downvotes, as they aren't clickable actions but "information" only. And for small posts the icons take up less space if they are placed horizontically