Version-Release number of selected component (if applicable):

RHEL 8.9

cockpit-300.1-1.el8_9.x86_64

How reproducible:

Always

Steps to reproduce

1.  Login to Cockpit UI
2.  Click on Terminal tab from LHS menu list
3.  Click on Appearance dropdown from RHS
4.  Select ' Dark ' theme(2nd option) from the list
5. Please reference attached screenshot for overlap issue

Expected results

Dropdown seen properly without any UI overlap issue

Actual results

Dropdown not seen properly .

UI overlap issue observed