Canonical has improved a lot of things for Ubuntu 14.04 LTS (Trusty Tahr), but a few problems still linger on, like the missing confirmation dialog for Suspend.
Ubuntu developers have added for Ubuntu 13.10 (Saucy Salamander) a series of very cool and great-looking confirmation dialogs for various actions, such as Restart, Log out, and so on.
Users can close the operating systems, either Ubuntu 13.10 or Ubuntu 14.04, from the upper right corner. All the commands are placed in the same place, Log out, Suspend, Restart, and Shut Down.
I can't tell you how many times I hit the Suspend option instead of Restart and Log out, and it's getting really annoying.
Ubuntu 14.04 development is still in full swing and there is enough time to make this happen. The launch is scheduled for April 17.