It has occurred that we need to store the suggestions that were applied in a course. Simply relying on the evidence will make it hard to compute data for that course only, join, etc... so we will introduce a new model user_competency_course which stores the proficiency and rating of a user in the context of a course.

So, when a teacher is suggesting a rate from a course we will populate the table user_competency_course and attach an evidence as we are currently doing. When a suggestion happens within an activity (e.g. triggered by auto completion) we will also record that at the course level. When the suggestion is in a context parent to a course we proceed as normal.

MDL-52979 will take care of displaying the information in the views.

At a later stage we may decide to rephrase "Suggest" if another word works better.