Feature: Autosave config setting when changed

Description of feature

Settings from config are automatically saved when changed.

How to test it

Change a config setting.

Checklist

Please check if your MR fulfills the following requirements:

• Unit tests have been added, if possible
• Documentation has been updated
• Build was run locally and any changes were pushed
• Lint has passed locally without error
• CHANGELOG.md has been updated

FYI: @awesome_dev_too