Polish work Item UI

Follow-up from #385149 (closed) where @uhlexsis pointed out small inconsistencies, issues with the UI and I asked regarding accessibility issues.

Dropdown changes size on hover

When moving the mouse over the dropdown and back again, there is a delay in when the caret for the dropdown is hidden. Therefore it looks like the dropdown is shrinking.

dropdown_delay

Focus states

As pointed out by @uhlexsis for the Health Status Widget implementation, after selecting a health status, the dropdown was still focused (although the focused state doesn't look like it's focused compared to other form elements in our platform).

In my opinion, elements should be visibly focused after the change happed for accessibility, because the user is still focused on the element. See https://web.dev/learn/accessibility/focus/#focus-indicator.

(More ideas to come)

Edited by Nicolas Dular