'Hibernate, Sleep, Restart, Shutdown' panel disappeared.
When I click on the red 'Quit' button in the right lower corner of the screen, it used to go to a grey screen with a panel in the centre with four buttons; Hibernate, Sleep, Restart, Shutdown. Now I get the grey screen but the panel with the four options does not appear and I have to push the on/off button to shut down the computer. Anybody know what happened and how to restore the panel with the four options?
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