Focus background change broken on buttons in superside bar menu
Summary
When navigating the super sidebar menu, when an item is in focus, the item should have an outline as well as an alternate background color (the same one as on hover), currently, the links are working fine but the buttons are no longer. Both links and buttons should have the same styling on focus.
Discussed in !118598 (comment 1369087097)
Steps to reproduce
On https://gitlab.com/dashboard/projects, navigate the sidebar menu using keyboard
Example Project
What is the current bug behavior?
What is the expected correct behavior?
Relevant logs and/or screenshots
Screen_Recording_2023-04-28_at_14.53.35
Output of checks
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