Fix scrollbar style for Select components

[krzysztofzuraw]

What I'm trying to achieve

I want to have an adequately styled scrollbar on Mulitselect, Select and Combobox components

Describe a proposed solution

Use techniques from https://ishadeed.com/article/custom-scrollbars-css/

Acceptance Criteria

Screenshots or mockups

Current scrollbar:

[github-actions[bot]]

This issue is stale because it has been open 14 days with no activity.