Improve emoji autocomplete/typeahead filtering
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=17191) </details> <!--IssueSummary end--> When I search for an emoticon with 2 words, like "face palm" I am expecting it to suggest an emoticon when I type "facepalm", but our search only returns a result if I search for "face_palm" | Expected - SLACK | GITLAB.COM | |---|---| | ![expected](/uploads/c503d9514503e0f31082310c01fcd649/expected.gif) | ![result](/uploads/0a05df4cae6ea1649a1491c1495c70f6/result.gif) | //cc @MadLittleMods ## Relevant code - [`app/assets/javascripts/gfm_auto_complete.js#L180-205`](https://gitlab.com/gitlab-org/gitlab/-/blob/e73e2ef11a18732d1a4c686b1f7ac611be78bcce/app/assets/javascripts/gfm_auto_complete.js#L180-205)
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