🚧 Accessibility improvement

[jelsabird]

User story: AB#485888

• Changed focus style on keyboard navigation
• Make focus go from last item in the list to the first when using arrow down (same behavior as EDS AutoComplete)
• Ability to keyboard navigate up and down between children and parents
• Change color of icon for open-button to primary resting
• Use the right clear-icon
• Option to display as text instead of chips (I think Per Christian changed his mind on this one, so this code could be removed)

Unsolved issue: When user tab-navigates through the menu items so that one item has focus, and also mouse hover over a different item, two items have focus style on the same time. There should only be one focused element at any time. When mouse hover a menu item, it should set element.focus().