Fix SHIFT + TAB issue on last element in focusTrap #780
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This will prevent a jump from the last to the first element when you press SHIFT + TAB on the last element, which isn't the first element.
Issue
Given you have three focusable elements: A, B, C.
Order on TAB (correct)
A > B > C > A > B > C > etc.
Order on SHIFT + TAB (incorrect)
A > C > A > C > A > etc.