`NumMinus` in `[3] branches` checks out previous branch even with `Shift-` modifier

### Describe the bug
`NumMinus` in `[3] branches` checks out previous branch even with `Shift-` modifier

### To Reproduce
Steps to reproduce the behavior:

* `3` > `Shift-NumMinus`

### Expected behavior
* just like `Shift-NumPlus` cycles the view in one direction (bigger), i thought `Shift-NumMinus` would cycle the view in other direction (smaller)
* i stumbled upon this when trying to cycle views while in `diff` mode (https://github.com/jesseduffield/lazygit/issues/466#issuecomment-605597601)
* my expectation for `Shift-NumMinus` cycling views might have been wrong, but lg's behaviour of cycling branch checkouts is not inline with gui-documentation either. it should have done nothing.

### Screenshots
If applicable, add screenshots to help explain your problem.

```
╭─Keybindings───────────────────────────────────╮
│ --- Local --- │
│ - Checkout previous branch │
│ │
│ --- Global --- │
│ + Next screen mode (normal/half/fullscreen) │
│ _ Prev screen mode │
│ | Cycle pagers │

```

### Version info:

* _Run `lazygit --version` and paste the result here_

```
commit=4486c86271fc83e9ace700b1a472016d692513a5, build date=2026-01-12T19:47:02Z, build source=binaryRelease, version=0.58.1, os=windows, arch=amd64, git version=2.52.0.windows.1
```

### Terminal info:
What terminal are you using, and which version? For some types of bugs this information can be relevant.

_nil_

### Additional context
Add any other context about the problem here.

_nil_

> [!NOTE]
> Please try updating to the latest version or [manually building](https://github.com/jesseduffield/lazygit/#manual) the latest `master` to see if the issue still occurs.

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