OO.ui.PopupWidget: Reword a comment to fit within max line length
OO.ui.PopupWidget: Reword a comment to fit within max line length

Change-Id: I1870b1ae72514396b02d10b22f8f4abe699975f5

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