many changes

• Libre 2 new sensor erroneous values fixed
• Libre 2 NFC scan re-write and new workflow
• Scanning will repeat up to 10 times to try and recover valid data. Whilst holding the top of the iPhone against the sensor, try moving it slightly if you notice that it starts to vibrate every second.
• Haptic (vibration) and visual feedback will be given during scanning
• New messages and alerts to simplify scanning process and inform the user of errors
• If scanning fails or invalid data is retrieved, xDrip4iOS will inform the user and offer to immedietly scan again
• Bluetooth scanning/connection for NFC-enabled sensors is now supressed until valid NFC data is retreived
• Bluetooth should now only connect to the sensor that was scanned (no more microwaves or golf-clubs needed!)
• Sensor status start/end time updated to be clearer. On home screen pop-up, sensor duration and remaining time (where applicable) now show in 6d14h format as per Nightscout style
• Dexcom visual battery indicator added to voltage B field (maybe be inaccurate for G4/G5 transmitters)
• Dexcom transmitter runtime -1 value suppressed if invalid
• EN/NL/ES/DE/FR/SV translations added for most new features
• “Interval” label updated to clearly identify individual notification/calendar/speech intervals to avoid confusion
• Calendar event visual range indicator added (can be enabled from Settings -> Calendar Events)
• Loop delay/calibration logic fix
• Libre 1 US “E6” new sensor ROM type compatibility (only for MiaoMiao transmitters - Bubble not yet compatible)
• A minimum 45 minute warm-up is now forced for all sensors after they are started. xDrip4iOS will ignore any readings until this time has elapsed.