[Import/Export] ability to force selective import of course content

Problem statement:

We would like to be able to disable the option for teachers to import a complete course without selecting which content is required. Using import of a complete course eventually leads to files, pages and other content in the course which isn't required, so it is larger than it needs to be and it is harder for all users to find what they need. It also means that settings from the previous year, such as customised navigation, are copied into the new course. This makes it harder for us to have a standard navigation and course settings across all our teaching courses.

Proposed solution:

Add a sub-account setting to disable import all content, allowing us to enforce the use of selective import from another Canvas course. This would lead to tidier courses with only relevant/current content and allow settings we have in our template course, which is applied to course shells, to persist in the new course used by teachers. We have a recommended course navigation, to have consistency across courses for students, which we change slightly each year. Selective import of content without course settings would make this the starting point and teachers would have to actively change this to not use our template.

User role(s):

admin,instructor