master v20191203.4

Continuous integration build 1247, based on Superbuild v20191114.

Changes:

• ISSkiOM 2019 symbol set, really (GH-1408)
• Symbol set updates (GH-1429, GH-1431)
• Revised file import and symbol assignment (GH-1437),
  fixing missing georeferencing setup (GH-1420)
• Fixed export of geographic coordinates (GH-1433)

All changes since previous master build