Sort shorter paths to the top

See here how `src/vs/editor` comes after the longer `src/vs/editor` paths:



![Image](https://github.com/user-attachments/assets/809fcaad-02ea-41b6-96b3-974e437faab7)


The changes view in SCM sorts it like this:



![Image](https://github.com/user-attachments/assets/73ed5620-c3f9-4a6f-b47a-62dd04e7fbcd)

