WikimediaUI theme: Align DecoratedOptionWidget's icon opacity to other widgets
WikimediaUI theme: Align DecoratedOptionWidget's icon opacity to other widgets

Bug: T195773
Change-Id: Ic54166dba3bffd7c3e7d6ea0a01b01a63a96c2a4

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