Merge pull request #185 from Unity-Technologies/fix_keypointlabeler_ui

Fix Post State Configs not showing up in 2019.4

com.unity.perception/Editor/GroundTruth/CameraLabelerDrawer.cs

         {
             foreach (var prop in m_LabelerUserProperties)
             {
-                EditorGUI.PropertyField(rect, prop);
-                rect.y += Styles.defaultLineSpace;
+                EditorGUI.PropertyField(rect, prop, true);
+                var height = EditorGUI.GetPropertyHeight(prop) + EditorGUIUtility.standardVerticalSpacing;
+                rect.y += height;
             }
         }