Don't show "confirm" dialog on shutdown

[SuNNjek]

Hello,

currently when I press the shutdown button in the lower left of the menu and select shutdown in the popup, I get another confirmation dialog like this:

Since I already selected shutdown in the popup, it's a bit annoying to have to press yet another button to confirm the action after I already pressed two buttons. Is there a way to disable this and have my computer shutdown after the second click?