updated sources for first release on sandbox version

lib/datamodel.dart

@@ -511,7 +511,8 @@ class EventStoreInstance extends EventStoreBase {
 
 String gitVersionHash = '';
 Future<void> loadGitInfo() async {
-  final commitHash = await rootBundle.loadString('.git/refs/heads/main');
+  //final commitHash = await rootBundle.loadString('.git/refs/heads/main');
+  final commitHash = await rootBundle.loadString('.git/refs/remotes/origin/main');
 
   gitVersionHash = commitHash.substring(0,8);  //Use the short version
   debugPrint("Commit ID: $gitVersionHash");

lib/overview.dart

@@ -91,4 +91,6 @@ class Overview extends StatelessWidget {
           )),
     );
   }
-}
\ No newline at end of file
+}
+
+//TODO: displaying commit hash does not work in build APK.
\ No newline at end of file