Fixed awards dropdown search text from repeating

## What does this MR do?

Thanks @zeiv for this!

>This fixes #20463 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

_(and #22525)_

## Screenshots (if relevant)

![2016-09-23_15.56.04](/uploads/b421400a08b3d9fa32c577e7d8952504/2016-09-23_15.56.04.gif)

## Does this MR meet the acceptance criteria?

- [ ] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [ ] All builds are passing
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?


Closes #22525

See merge request !6498