GPX Tooling

[intere]

Background

• [x] Added the distance to the tracks and added a "standard GPX" export (which you can open in google earth).
• [ ] WIP - working on an "expanded track" capability, e.g. create a polygon that is x meters from the track in all directions.
  • It's close, but it's not quite right, see the image below:

Features Implemented

• [x] Renamed "GPX" to "Xcode GPX" (which is the format that it's in)
• [x] Created a "Normal GPX" export

Checklist

• [x] Appropriate label has been added to this PR (i.e., Bug, Feature, Under Construction, etc.).
• [ ] Documentation has been added to all open, public, and internal scoped methods and properties.
• [ ] Tests have have been added to all new features.
• [ ] Image/GIFs have been added for all UI related changed.