fix(customize-banner): fix upload and replace ima

[juniusfree]

:pushpin: References

• Wonder issue:
• Related pull-requests:

:blue_book: Description

Fix deletion and upload of banner

:movie_camera: Screenshot or Video

https://github.com/wondrous-dev/wondrous-frontend/assets/8164667/a7d58ac2-f1fb-4a53-a0c3-f0923e13f11b

https://github.com/wondrous-dev/wondrous-frontend/assets/8164667/6c2709a8-cabc-43b7-9ba0-80e65c4796f6

:cake: Checklist:

• [x] I self-reviewed my changes
• [x] My changes follow the style guide: https://creative-earth-33e.notion.site/TT-Wonder-Style-guide-4702a45133374148953bfcaf584120b7
• [x] I tested my changes in Chrome

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