Changing Gpx and Trkpt indexes so that GPX are sorted by datetime desc and Trkpt use their timestamp as indexes.

src/components/gpx-import/GpxImport.tsx

@@ -21,9 +21,9 @@ const GpxImport: Component = () => {
       'load',
       () => {
         // this will then display a text file
-        console.log(fileReader.result);
+        console.log({ caller: 'GpxImport / XML', result: fileReader.result });
         const gpx = GPX.parse(fileReader.result);
-        console.log(`gpx: ${JSON.stringify(gpx)}`);
+        console.log({ caller: 'GpxImport / JSON', gpx });
         if (gpx) {
           const startTime = new Date(findStartTime(gpx)!);
           dispatch({