Revert "AnswerAnalysisAE: Completely disable LATByFocus generator, i.e. even the CD->measure LAT"

This reverts commit f74665752a8d30a3d1688fcb8e3b76e0a84a1d92.

This is *obviously* wrong since it also removes LATs by NEs.
*sigh* feature conflation...
LATByFocus: Disable addFocusLAT(), generate LATs only by NEs in Focus