remove vi key binding

Signed-off-by: Binglin Chen <binglin.chen@intel.com>
modified tab indent

Signed-off-by: Binglin Chen <binglin.chen@intel.com>
remove indent for enter

Signed-off-by: Binglin Chen <binglin.chen@intel.com>
remove global-pointback-mode for ggtags

it will prevent tag jump

Signed-off-by: Binglin Chen <binglin.chen@intel.com>
set ibuffer sort order to recency

Signed-off-by: Binglin Chen <binglin.chen@intel.com>