GPS Recorder: invalid Date of Track

Thanks :)

So, I played around with Debugger and here's the result:

Most likely my assumptions are correct: somehow the GPS Recorder writes empty lines to routes, and interface.html cannot process the empty line correctly, right? Therefore, an error occurs with the Invalid Date and NaN.

Could you please add empty line handling to interface.html? Empty lines from routes must either be ignored or incorrect data must be deleted during the execution of the script (the track's data where there is NaN).