Fix Config object saving to asset

[mtrive]

Description

Looks like ignoring an issue has never worked due to the Config asset not being saved if the corresponding scriptable object in memory changed.

Changes made

With this change, the Config object is marked dirty every time a rule is added/changed/removed, and serialized to the corresponding asset.

Checklist

Before review:

• [x] Changelog entry added.
  • Explains the change in Changed, Fixed, Added sections.
• [ ] Tests added/changed, if applicable.
  • Functional tests Area_CanDoX, Area_CanDoX_EvenIfYIsTheCase, Area_WhenIDoX_AndYHappens_ThisIsTheResult.
• [ ] Docs for new/changed API's.
  • Code is annotated using Xmldoc syntax.