Add BetterMouse

[gettinwet]

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Types of Changes

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• New addition to list
• Fixing bug in existing item in list
• Removing item from list
• Changing structure (organization) of list

Proposed Changes

Describe each of your changes here to communicate to the maintainers why we should accept this pull request.

1. Add the app to the Chinese list which is already in the English list.

PR Checklist

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• I have read the CONTRIBUTING guide
• I have explained why this PR is important
• I have added necessary documentation (if appropriate)

Further Comments

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