Settings: follow kitkat's ui

- manage apps; tab selector and ram usage
- battery data usage bar
- app widget toggle

Change-Id: I804b4b47563545d7ab124f4cc4800ef4034bf754

Conflicts:
	res/values/colors.xml
zh-rCN: update translation

Change-Id: I345bf448716646449900d684734dae3ad123914c