Show the link even if the course contains no assessable course elements.

Calculation of the learning path status of the course nodes.
First draft of a GUI to visualize the learning path of a course participant.

Rearrange the different settings in the same place with a segment view
for all resources. Implement a new flag for resources "bookable" which
indicates the entries with a booking methods. Guests users doesn't have
a right to view courses with booking methods.

status, all users, guests flags

to curriculum coaches and participants and assessment tool

breadcrumb without disabled the whole component which contains something
else

OO-2967: all a list of the assessment planned today and in the future in assessment tool, add a message if an assessment is done currently