I just tested the method in the reply about creating a desktop launcher, and it seems to work. Once the launcher is created right click on it and click "make file executable", and it should then work.
When you try to create the launcher only type in the word "turn" and a drop down list should appear with the "Turn off computer" as one of the items that can be selected.
When you try to create the launcher only type in the word "turn" and a drop down list should appear with the "Turn off computer" as one of the items that can be selected.
“I have not failed. I’ve just found 10,000 ways that won’t work.” - Thomas Edison