Description

Summary of changes

• Our model sections now also use the section mixin.
• For plugin components, when resolving mixin names to actual mixins, we check now if the component is extending a parent component. And if so, if that parent already included the mixin.

Reasoning

• All plugin sections get the section mixin automatically injected. Our core sections should deal with the same.
• When a section like pages section got extended so far, the section mixin was force injected and overwrote the load method from the parent (pages section).

Additional context

Marked for 4.7.0 to have sufficient time for testing and not needing to rush merging for 4.6.0 - if it can be tested before, no objections against including it already in 4.6.0.

Changelog

Fixes

• Custom sections: fixed issue where Vue mixin would overwrite load method
  Section extension: extending core sections doesn't work #6809

Ready?

• In-code documentation (wherever needed)
• Unit tests for fixed bug/feature
• Tests and CI checks all pass

For review team

• Add lab and/or sandbox examples (wherever helpful)
• Add changes & docs to release notes draft in Notion