If-Then-Else conditions

[danielghost]

What happened?

The If-Then conditions for https://github.com/adaptlearning/adapt-contrib-scoringAssessment/blob/issue/8/schema/article.schema.json#L209-L225 prevent the plugin from being enabled. The schema is correctly validated in the tool, i.e. an error is raised if the plugin is enabled and the _id is empty. However, the _isEnabled property is never saved and the plugin remains disabled.

Steps to reproduce

• Add https://github.com/adaptlearning/adapt-contrib-scoringAssessment/tree/issue/8 to the AAT
• Add to project
• Enable the plugin on an article and set an _id
• Save
• When returning to edit the article, the plugin is now disabled.

[taylortom]

This one is blocked by adapt-security/adapt-authoring-ui#269 (Backbone forms doesn't currently support if/then/else)