Maps: Use mapboxgl as default map on Linux, as osm hangs on a variety of distros / Qt versions

plugins/feature/vorlocalizer/vorlocalizergui.h

@@ -268,6 +268,7 @@ private:
     void updateVORs();
     void readNavAids();
     void updateChannelList();
+    void applyMapSettings();
 
 private slots:
     void on_startStop_toggled(bool checked);