MWGIS-213; after GitHub Issue #189; GridLinesVisible always returned VARiANT_TRUE
MWGIS-213; after GitHub Issue #189; GridLinesVisible always returned VARiANT_TRUE

MapWindow/MapWinGIS,MapWindow/MapWinGIS,MapWindow/MapWinGIS,MapWindow/MapWinGIS,MapWindow/MapWinGIS