Basic Icedove configuration

See ideas on the blueprint (#5663 (closed)), Basic configuration & integration section.

Blueprint: https://tails.boum.org/blueprint/Return_of_Icedove__63__

Feature Branch: kytv:feature/5663-return-to-icedove

Parent Task: #5663 (closed)

Subtasks

• #9882 (closed)

Related issues

• Blocks #10332 (closed)

Original created by @tails on 6151 (Redmine)