Application is not responding when gpx workout has > 10k records.

[andrewg78]

Steps to reproduce:

1. I was testing https://github.com/jonasoreland/runnerup
2. Default logging interval was set to 1s
3. I got 12850 records in GPX file after the workout.
4. UI is not responding for nearly 30s during workout loading (page is not responding popup)
5. Once the map is loaded, the response time is increased when moving the map.

Suggestions:

1. Track simplification to reduce resolution of the GPS path when the Map is rendered.