GlucoDataHandler

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- Glucose chart added
- Delta and trend calculation on historical data
- New source: Notification Reader added by Rohan
- Battery Level widget added by Robert
- AOD support added by Robert
- Sensor age for LibreLinkUp added
- Layout changes
- Hungarian language added

Special thanks to all testers, especially Shawn, Cyndi, Michael D., Michael V., Rohan, Cibrán, Paul, Graham, Jensen and derDer!!!