Settings: Remove redundancy in description

* All these settings are under a 'Volume buttons' header.
  Avoiding duplication of 'Volume button' makes it easier for
  translators

Change-Id: I51eb2de69c2f038f13d95a8e97bde1ecf83df913
Show "Eject card" for usb storage

Readd the "Eject" options if the SD card is mounted via usb.

Change-Id: I802cf4d20eb3b45ce068f89c22352f79999d593e
Settings: Use consistent title for button wake up

Following http://review.cyanogenmod.org/63421

Change-Id: Ib1821374b5c54f80d3d52e9057f62bf8c80a1dd6