Merge pull request #7660 from mavlink/CheckInternet

src/QGCApplication.cc

src/QtLocationPlugin/QGCMapEngine.cpp

src/QtLocationPlugin/QGeoTileFetcherQGC.cpp

src/Settings/App.SettingsGroup.json

src/Settings/AppSettings.cc

src/Settings/AppSettings.h

src/ui/preferences/GeneralSettings.qml