Multi-select dropdown doesn't have a scroll bar

[ali-hv]

What version of Unfold are you using?

For example: 0.71.0 or main

What version of Django are you using?

For example: 5.2

What browser are you using?

For example: Firefox 128.0

Did you checked changelog/commit history, if the bug is not already fixed?

For example: Yes

Did you searched other issues, if the bug is not already fixed?

For example: Yes

Did you checked documentation?

For example: Yes

Are you able to replicate the bug in the demo site?

For example: No

Repository with reproduced bug

Create minimal repository where it is possible to reproduce an error.

Describe your issue

After version 59, the scroll bar in multi-select widget is gone:

But we had it in versions before 59:

[lukasvinclav]

Thanks for report. Fixed #1702