Keyboard focus improvements for font features/axes #19713
Description
Adding an item is generally done by clicking the "add new" button and selecting an item from the flyout. However, when you do this from the keyboard, it feels a little weird. Your focus stays on the add new button.
Ideally, it would move to the newly added item.
This is particularly bad if the user added the last feature/axes. Since that disables the add new button, the button can't be focused, so it gets yeeted to the tab row.