Improvement: With the categorybreadcrumbs setting, the course main page is missing between the category breadcrumb and the topic

[abias]

This is a follow-up issue to #317 / #483:

After integrating #483, it became aware that the course main page is missing between the category breadcrumb and the topic:

This might confuse users who want to use the breadcrumb to jump back to the course main page.

However, adding the full course name to the category breadcrumb might make it simply too long.

We could think about simply adding an icon which points to the course main page. This could look like this:

[cjbsdigitallearning]

I know this issue has already been addressed in the latest release v4.3-r12 (2023102035) but not a fan of the use of the icon (mortar board) in this case. That icon is not obvious to users, looks out of place in the breadcrumb when all the rest are words. May I suggest the word "Course" would be better and would then align with the primary course navigation.

[lucaboesch]

I suggest the course short name.