Background of Loader in mobile view

[aryanndwi123]

Description

The loader in mobile view has a background that is split between white and blue, and initially displays a search bar for blocks within the loader. You can see an example of this in the provided video.

Expected Behavior

The background should be a single color (white) and there should be no search bars.

Screenshots

https://github.com/sugarlabs/musicblocks/assets/100300789/06a28aa4-d608-4107-a60e-b61c7ba648a0

How to Reproduce

Reload https://musicblocks.sugarlabs.org/ in mobile view .

Environment:

• Operating System: [e.g., Windows, macOS, Linux]
• Browser (if applicable): [e.g., Chrome, Firefox, Safari]
• Version of Software/Project: [e.g., v1.0.0]

Checklist

• [x ] I have read and followed the project's code of conduct.
• [x ] I have searched for similar issues before creating this one.
• [x ] I have provided all the necessary information to understand and reproduce the issue.
• [x ] I am willing to contribute to the resolution of this issue.

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