* Theme support tied to built-in Android themes (@proletarius101)

* New top banner notifications: "No Internet" and "No Data or WiFi enabled"

* Improved handling of USB-OTG and SD Card repos and mirrors

* Stop repeated updates of Trichrome Library

* More changes to follow Material Design (@proletarius101)

* Improve OpenCollective badge (@ConnyDuck)

* Overhaul icon loading using Glide (@proletarius101)

* New adaptive icon (@12people)

* Code modernization (@Isira-Seneviratne)
