[CLNP-7430]Custom emoji category rendering issue

[danney-chun]

[fix]: Custom emoji category rendering issue.

Emoji의 갯수가 8개가 넘어가는 경우, EmojiListItems에서 ul의 max-width가 고정이 되어 있어, padding 계산이 제대로 이루어 지지 않는 이슈 수정.

Fixes CLNP-7430

Changelogs

• Fixed a bug in the Custom emoji category rendering issue

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[OnestarLee]

lgtm!

[roderickhsiao]

thank you!