New app sidebar with support for folders, custom ordering and support for left/right side [2/2]

Patch Set 2:
  Added option for displaying visible tab.

Change-Id: I2b8d1be833205aeff505da4be05dfb3da4500460

Conflicts:
	res/values/arrays.xml
	res/values/strings.xml
	res/xml/app_sidebar_settings.xml
	src/com/android/settings/chameleonos/AppSidebar.java