message: Cleaned up
  Removed unnecessary comments; replaced `break wpoints_loop` with `continue wpoints_loop` which caused infinite loops, let's see if it still happens and if I can fix it...
diff: @@ -386,6 +386,7 @@ export class GalleryMapLightboxComponent implements OnChanges {
  // tslint:disable-next-line:prefer-for-of
  for (let i = 0; i < this.gpxFiles.length; i++) {
  const file = this.gpxFiles[i];
  + // get <trkpt> items into path[] and <wpt> items into wpoints[]
  const [path,wpoints] = await this.mapService.getMapCoordinates(file);
  if (file !== this.gpxFiles[i]) { // check race condition
  return;
  @@ -393,22 +394,14 @@ export class GalleryMapLightboxComponent implements OnChanges {
  if (path.length !== 0) {
  this.mapLayersControlOption.overlays.Paths.addLayer(marker(path[0] as LatLng));
  this.mapLayersControlOption.overlays.Paths.addLayer(polyline(path as LatLng[]));
  - // console.log('Trk path is not empty, in file ' + i + ', path[0]=' + JSON.stringify(path[0]));
  - } else {
  - // console.log('No trk path in file ' + i);
  }
  if (wpoints.length !== 0) {
  - // console.log('Wpt exist in file ' + i + ', wpoints[0]=' + JSON.stringify(wpoints[0]) +', wpoints.length=' + wpoints.length);
  wpoints_loop: for (let wpt_i = 0; i < wpoints.length; wpt_i++) {
  - // console.log('item number ' + wpt_i + ' out of ' + wpoints.length + ', coord=' + JSON.stringify(wpoints[wpt_i]));
  if (wpoints[wpt_i] === undefined) {
  - break wpoints_loop;
  + continue wpoints_loop;
  }
  this.mapLayersControlOption.overlays.Paths.addLayer(marker(wpoints[wpt_i] as LatLng));
  }
  - // console.log('Wpoints plotted.');
  - } else {
  - // console.log('No wpt points in file ' + i);
  }
  }
  }
  