Commits scrollbar cut by icon

**Describe the bug**

When an icon appears as the last character on the commit tab (probably others too), the scrollbar is cut. See attached screenshots.

**To Reproduce**
Steps to reproduce the behavior:

1. Open any git repo with icons ([ratatui main](https://github.com/ratatui-org/ratatui/) has recent commits with icons)
2. If needed, adjust the size of the terminal/pane so that the icon is the last shown character

**Expected behavior**
The scrollbar should always be visible. The icon hidden or shown as needed.

**Screenshots**

lazygit on alacritty

lazygit on xfce4-terminal

When the handle is aligned with the icon

**Version info:**
```sh
$ lazygit --version
commit=5e388e21c8ca6aa883dbcbe45c47f6fdd5116815, build date=2023-08-07T14:05:48Z, build source=binaryRelease, version=0.40.2, os=linux, arch=amd64, git version=2.34.1
$ git --version
git version 2.34.1
```

**Additional context**
That's really not disturbing or anything, but still a bug. Your call if you think it's a necessary fix.
It's very likely this is due to icons being multibytes.

Otherwise Lazygit is great, thank you!

**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.
I'd like to avoid building from main as I don't have the go tooling installed. But if that's really necessary just tell me.