[CLNP-7430]Custom emoji category rendering issue (#1363)

[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](https://sendbird.atlassian.net/browse/CLNP-7430)

### Changelogs
 - Fixed a bug in the Custom emoji category rendering issue

### Checklist

Put an `x` in the boxes that apply. You can also fill these out after
creating the PR. If unsure, ask the members.
This is a reminder of what we look for before merging your code.

- [x] **All tests pass locally with my changes**
- [ ] **I have added tests that prove my fix is effective or that my
feature works**
- [ ] **Public components / utils / props are appropriately exported**
- [ ] I have added necessary documentation (if appropriate)


## External Contributions

This project is not yet set up to accept pull requests from external
contributors.

If you have a pull request that you believe should be accepted, please
contact
the Developer Relations team <[email protected]> with
details
and we'll evaluate if we can set up a
[CLA](https://en.wikipedia.org/wiki/Contributor_License_Agreement) to
allow for the contribution.


[CLNP-7430]:
https://sendbird.atlassian.net/browse/CLNP-7430?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

Author: danney-chun

src/ui/ContextMenu/index.scss

@@ -57,7 +57,6 @@
   top: 100%;
   left: 0;
   min-width: 44px;
-  max-width: 352px;
   max-height: 208px;
   overflow-y: scroll;
   margin: 0px;

src/ui/MobileMenu/MobileBottomSheet.tsx

@@ -212,7 +212,7 @@ const MobileBottomSheet: React.FunctionComponent<MobileBottomSheetProps> = (prop
                     {showMenuItemDeleteFinal && <DeleteMenuItem />}
                     {showMenuItemDownload && <DownloadMenuItem />}
                   </>
-              )}ß
+              )}
             </div>
           )}
         </div>