Feature: Additional data in waypoints/annotations

[brianbv]

I maintain and build trails for hiking and cycling. The annotations are a nice feature, but it would be great to be able to store additional data with a waypoint. The GPX file format supports adding a description to the waypoint, what is the interest level for adding this to GPSLogger?

This could be part of the annotations screen, or perhaps just a button on the main screen that says "➕add note" . If there is interest, I'd be happy to look into developing the feature and submitting a PR.