In the create new world screen, the tab list (game/world/more) is tab-focusable. When focused, keyboard nagivations are correct, including using left/right arrow to switch another tab. However, when the tab list is focused, there is neither highlight nor border to indicate it is focused. It looks as if is it not focused. However, when mouse hovers on it, white borderes are rendered.

When the tab list not focused (while the text field is):

When the tab list is tab-focused:

When the tab list is mouse-hovered: