This is a regression and worked on 5.4.1.
See screenshot of the up and down arrows that are not working.
User can scroll through the list using touchpad and arrow keys.
|For Gerrit Dashboard: QTBUG-49831|
|143540,1||Partially revert 025d6a so that the event is sent to the popup||5.5||qt/qtbase||Status: ABANDONED||0||0|
|143608,5||QWidgetWindow: The alien widget should be from the window's hierarchy||5.5||qt/qtbase||Status: MERGED||+2||0|