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

BetterMouse is a new utility that has all features external mice need to function better and more efficiently. It has smooth scroll, cursor acceleration & speed tweak, and button/gesture remapping to various actions and shortcuts all in one, like no other similar tools can do currently.

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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