Try longpressing for only 2-3 seconds, the below is what my power menu from the 21 Nov nightly looks like. I also am using JRummy's ROM Toolbox to update certain statusbar icons and the HTC.EleganceX theme from CM 10.2 along with Nova launcher version 2.3beta3.
I'm assuming you are also using the latest Recoveries from either CWM or TWRP?
---------- Post added at 12:50 AM ---------- Previous post was at 12:48 AM ----------
Haven't found a screen shot option yet either. Some other 4.4 Roms out have that already implemented, but not yet with CM it seems. It will come though.
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