Greeter revamp: phase 1.2

Originally created by @alant on #12069 (Redmine)

This phase includes the nice options that would be welcome to be added to the revamped greeter in the future as improvements for the Welcome and Advanced configuration screens.

Parent Task: #5464 (closed)

Subtasks

• #9004 (closed)
• #10814 (closed)
• #10817 (closed)
• #10823 (closed)

Related issues

• Related to #14544 (closed)