Api improments

[ville_sml]

For new addon for locus using dynamic data minor improments to locus api would be nice.

1. Resending points to Locus.
If you put guide on and update point position guide still guides to old position. Points are replaced, not updated. If external points are updated Locus should also update guiding etc.

2. Focus on points.
If you send points to locus, screen is adjusted to show all points sent. This should be adjustable for each point separetly. Eg. Each point should have value if it want to adjust to map screen to be shown in map.

3. (nice to have feature). Some way to display point tracks on map, similar as record own position.