Fixed awards dropdown search text from repeating

What does this MR do?

Thanks @zeiv for this!

This fixes #20463 (closed) by adding the .emoji-search class to the "Search results" h5 element. AwardsHandler.prototype.setupSearch() was trying to remove the element before creating a new one, but wasn't because the it was attempting to select it with the .emoji-search class, which wasn't being added.

Are there points in the code the reviewer needs to double check?

I don't believe so.

Why was this MR needed?

See #20463 (closed)

(and #22525 (closed))

Screenshots (if relevant)


Does this MR meet the acceptance criteria?

What are the relevant issue numbers?

Closes #22525 (closed)

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