This is another variant for this [original
PR](https://github.com/zed-industries/zed/pull/10091) to add settings to
show/hide navigation history buttons that puts the settings under a new
section called `tab_bar`:

```
  "tab_bar": {
    // Whether or not to show the navigation history buttons.
    "show_nav_history_buttons": true
  }
```

<img width="314" alt="Screenshot 2024-04-02 at 3 00 53 PM"
src="https://github.com/zed-industries/zed/assets/1253505/23c4fa19-5a63-4160-b3b7-1b5e976c36bf">
<img width="329" alt="Screenshot 2024-04-02 at 3 01 03 PM"
src="https://github.com/zed-industries/zed/assets/1253505/64c2ebd2-9311-4589-a4e8-bd149c6c4ece">