src/vs/base/browser/ui/list/listWidget.ts/KeyboardController/onUpArrow
class KeyboardController:	private onUpArrow(e: StandardKeyboardEvent): void {
		e.preventDefault();
		e.stopPropagation();
		this.list.focusPrevious(1, false, e.browserEvent);
		this.list.reveal(this.list.getFocus()[0]);
		this.view.domNode.focus();
	}