[Plasmoid] Use icon for battery and connectivity status
## Summary Use a pretty, granular icon for battery and connectivity status instead of whacking it into the device name. ## Test Plan It looks so nice! ![image](/uploads/7e64d1339507e1dae90ee70c02327aa6/image.png) Tested all provided icon states by hacking Battery.qml and Connectivity.qml to provide different values.