Relying on the change handler for Gpx, Trk and Trkseg too.

src/db/change-handler.ts

@@ -1,6 +1,8 @@
 import { getWpt } from '../db/wpt';
 import { returnAgain } from '../workers/dispatcher-worker';
-import { getAllGpxes } from './gpx';
+import { getAllGpxes, getGpx } from './gpx';
+import { getTrk } from './trk';
+import { getTrkseg } from './trkseg';
 
 declare global {
   var watches: Map<string, any>;
@@ -8,6 +10,9 @@ declare global {
 
 const methods = {
   getAllGpxes,
+  getGpx,
+  getTrk,
+  getTrkseg,
   getWpt,
 };