Merge pull request #5156 from dogmaphobic/offlineTokens

src/QtLocationPlugin/QGCMapEngine.cpp

src/QtLocationPlugin/QGCMapEngine.h

src/QtLocationPlugin/QGCMapUrlEngine.cpp

src/QtLocationPlugin/QMLControl/OfflineMap.qml

src/QtLocationPlugin/QMLControl/QGCMapEngineManager.cc

src/QtLocationPlugin/QMLControl/QGCMapEngineManager.h

src/Settings/App.SettingsGroup.json

src/Settings/AppSettings.cc

src/Settings/AppSettings.h

src/Settings/FlightMapSettings.cc