message: updating settings description
diff: <div class="card-body">
  <div [hidden]="!error" class="alert alert-danger" role="alert"><strong>Error: </strong>{{error}}</div>
  - <ng-container i18n>Reads and show *.gpx files on the map</ng-container>&nbsp;
  + <ng-container i18n>Reads and show *.gpx files on the map and *.md files (blogs) in the gallery.</ng-container>&nbsp;
  <button class="btn btn-success float-right"
  