i3 and XFCE: how to get rid of the Desktop container, float windows and shutdown the machine?

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http://unix.stackexchange.com – I'm using the i3 Window Manager, and am quite happy so far, but I have a few issues. Using XFCE, my "Desktop" is seen as a separate container (window). That means that when I open a new program in the first workspace, that it will split the screen in two and show Desktop as one window, and the other program in another window. I can minimize the size of the desktop, or use the 'tabbed' option to minimize impact, but this is all not convenient. I want i3 not to treat the Desktop as a Window, at all. If that means 'losing' my Desktop, no problem. I tried 'closing' this window, but my whole ses (HowTos)