Can't resize textarea/contenteditable div from inside the list item

### Describe the bug

The item doesn't resize vertically when using a textarea that can be resized vertically by the user or a contenteditable div and the text goes to a new line.
Also after going to a new line and it fails the selected textarea/contenteditable div lose focus.

Tested on Firefox and Edge.

### Reproduction

https://github.com/dragos-boisteanu/scroller-issue

commit: [vertical scalling with textarea and contenteditable](https://github.com/dragos-boisteanu/scroller-issue/commit/c85ddebeb6b0f60df17b31f05ca7f403ca122fcd)
The top is vue-virtual-scroller where the problem is and the bottom is another lib where this works as intended

### System Info

```shell
System:
OS: Windows 10 10.0.22000
CPU: (12) x64 AMD Ryzen 5 5600H with Radeon Graphics
Memory: 3.22 GB / 15.36 GB
Binaries:
Node: 16.17.0 - C:\Program Files\nodejs\node.EXE
npm: 8.15.0 - C:\Program Files\nodejs\npm.CMD

Vue 2.6.14
vue-virtual-scroller 1.1.2
```

### Used Package Manager

pnpm

### Validations

- [X] Read the [docs](https://github.com/Akryum/vue-virtual-scroller/blob/master/packages/vue-virtual-scroller/README.md).
- [X] Check that there isn't [already an issue](https://github.com/Akryum/vue-virtual-scroller/issues) that reports the same bug to avoid creating a duplicate.
- [X] Check that this is a concrete bug. For Q&A open a [GitHub Discussion](https://github.com/Akryum/vue-virtual-scroller/discussions).
- [X] The provided reproduction is a [minimal reproducible example](https://stackoverflow.com/help/minimal-reproducible-example) of the bug.