Beacon - real time location sharing

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• Made it easier to share a link to the current ride.
• Added support for bulk deletion of rides (long press to select).
• Added an option to upload an activity to Strava.
• Advanced feature: separated auto stop from auto start (as it might have led to crashes).
• Renamed "Ride" to "Activity", as the app isn't limited to only cycling.
• Fixed issues on KitKat.
• Other bug fixes.