Elektra: Use Case: Drag & Drop keys

Elektra 0.8.24

Use Case: Drag & Drop keys

## Summary

- Title: Drag & Drop keys
- Scope: Configuration
- Level: User Goal
- Actors: User (usually a sysadmin)
- Brief: User drags a key (with a subtree) to a different subtree.

## Scenarios

- Precondition: View configuration of an instance.
- Main success scenario: User moves a key (and its subtree) to another subtree by dragging it to to the desired position.
- Alternative scenario: User enters data that violates a validation rule, an error message is shown.
- Error scenario: Technical problems while persisting to the key database. The user is informed about the problem.
- Postcondition: The updated key structure is persisted to the database.
- Non-functional Constraints: -