Revert "Navigation Bar height"

This reverts commit 1c91f1150d02097ab22735a2b5e200fd4eb27976.

Conflicts:
	res/values/bliss_arrays.xml
	res/values/bliss_strings.xml
	res/xml/display_settings.xml
	src/com/android/settings/DisplaySettings.java

Change-Id: I34e4c64c4a63bc6bb8d45d63ba95e5b15c22fd93
[Settings] Nav bar tweaks

- Toggle on/off (CyanogenMod alredy did but only for hw keys devices). crDroid allow all devices to do that for those using PIE apps.
- Nav bar dimensions (height and width)

PS: THIS COMMIT IS A SQUASHED PORTED FROM crDroid KK and 99% od the codes are from SlimRoms. I want to say a HUGE thanks to @kufikugel

Conflicts:
	res/values/cr_strings.xml
	res/xml/button_settings.xml
	src/com/android/settings/ButtonSettings.java

Conflicts:
	res/values/cm_strings.xml
	res/xml/button_settings.xml
	src/com/android/settings/ButtonSettings.java

Change-Id: I8e3ae2a9d0ccb81b3cf3cbd0fc1c26988a612eae