hiding unused controls

Change-Id: I9cfcfc80f4c863ba26bb57d9a280c869f1d04071
KeyColumn now optionally filters by a keyType and displays it in its
title.

Change-Id: I620aa1423264bd19307e478ca81a2ad6c73c9b1a
fixed bug where column list would be blank

Change-Id: Ie0186e81f81d6be013f789b33edd78d5855025cc
added checks for null

Change-Id: I2411ad26ea79d3160c9b049ed01ac129060e5c64
data browser now displays column data.

Change-Id: Ifc144c9ab279cf58351cba06ecafb3be3ba8b2a2