Add flight mode and GPS fix type to drone status menu

MSP_RAW_GPS already reports a fixType byte (0=no fix, 1=2D, 2=3D) but
only a collapsed hasFix bool was surfaced past the parser. Thread
fixType through TelemetryFrame and show it as a color-coded field in
the status grid, alongside the already-parsed but previously unshown
flight mode string. Arming/Temperatures/Flight mode is now a 3-column
row, and GPS fix type/GPS satellites/GPS precision (HDOP) another.

app/lib/transport/mock/mock_flight_controller_link.dart

@@ -102,6 +102,7 @@ class MockFlightControllerLink implements FlightControllerLink {
         lat: lat,
         lon: lon,
         hasFix: true,
+        fixType: 2,
         numSat: 12,
         altitudeM: 120,
         // Leicht abweichend von altitudeM statt identisch (Doku: rohe