0.01: First version
0.02: Don't break if running on 2v08 firmware (just don't display anything)
0.03: Fix positioning
0.04: Show GPS fix status
0.05: Don't poll for GPS status, override setGPSPower handler (fix #1456)
0.06: Periodically update so the always on display does show current GPS fix
0.07: Alternative marker icon (configurable via settings)
0.08: Add ability to hide the icon when GPS is off, for a cleaner appearance.
0.09: Do not take widget space if icon is hidden
