DFU Library
- Fixed scanning with screen off by @philips77 in #455
App
- Bug fix: clearing state causes issues with "Don't keep activities" enabled by @philips77 in #456
- Migration to Nordic Common 2.1 by @philips77 in #457
Other
- Images in Readme updated by @philips77 in #458
Full Changelog: 2.5.0...2.6.0