Revert "tabs -> spaces"

This reverts commit c4e4557a406277bc7cbd64025fe6cb96458952bd.

Conflicts:
	cm.mk

Change-Id: I64214dfbbef9a4a71591708a272292715e1e75d8
whitespaces fix + remove config_showNavigationBar (it's same as default)

Change-Id: I2daaa2f712c1eb25399037b42582322a8cc977e7