BookletLayout: In setPage, select the outline if no item is currently selected
BookletLayout: In setPage, select the outline if no item is currently selected

If outlineSelectWidget.findSelectedItem returns null (as it can)
we currently skip over the logic to highlight the current page.
We should always re-select the current page if no page is selected.

Bug: T301256
Change-Id: I93918036a66dfebac9ac2c4c2f06f1cec730a251

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui