[WIP] Support to link other devices to this#232

Draft

LokiMidgard wants to merge 2 commits intosignal-csharp:masterfrom LokiMidgard:device-linking

+746-23

Commits on May 9, 2021

Added DeviceSettingsPage with QR reader
LokiMidgard
committed

Commits on May 16, 2021

Working on device linking
LokiMidgard
committed