Accessibility issues with Search Filter (recommendation)

[roelvangils]

(Recommendation from Erik)

• Escape closes the dropdown but it does save the selected radio boxes. Should it get a submit button?
• The window does not scroll when the focus moves down.
• The "clear stuff"-button is red for unclear reasons. It is also before the checkboxes it can clear. This makes it easy to miss for both visual and AT users. Suggest to move it after instead.
• The group of radiobuttons is not marked up as a radiogroup.
• The hover state of the radiobuttons has the same issues as that of the menu.