This PR improves UX by converting spaces to hyphens, following branch
naming conventions and allowing users to create branches without
worrying about naming restrictions.

I think a few other git tools do this, which was nice.



![image](https://github.com/user-attachments/assets/db40ec31-e461-4ab3-a3de-e249559994fc)

Release Notes:

- Updated the branch picker to convert spaces to hyphens when creating
new branch names.

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Co-authored-by: Marshall Bowers <git@maxdeviant.com>