(Settings editor UI) For two settings of the built-in extension, Git, the default value is not marked

[darkred]

Does this issue occur when all extensions are disabled?: Yes/No

• VS Code Version: 1.59.0 (and 1.60.0 insiders)
• OS Version: win10 x64

Steps to Reproduce:

It's about the built-in extension, Git: For some of its settings, the default value is not marked:
(follow-up of #58712 )

1. Open Preferences | Settings, search for git.autofetch
2. Click its dropdown: although it has the default value, false, the word "default" is not displayed to the right of the row.
   Note that its default value in defaultSettings.json is: "git.autofetch": false,
3. The same occurs with git.autoRepositoryDetection (default value: true)
4. But, it doesn't occur with any other setting of the Git extension,
   and I haven't found any other built-in extension that this occurs.