Update selection & colors
Update groups
Show on map location
Update osmo description
export gpx files
permission not needed
option to import favourites.gpx as favourites
Merge pull request #650 from krabaey/feature-export-gpx

export gpx files
Merge pull request #651 from krabaey/feature-favourites-import

option to import favourites.gpx as favourites
Add share options/start offline thread
Add show group info