Removed old typeset pending
Removed because redundant
Do not activate a tab if some selection needed to be made first in a previous tab

previous tab identified using the data-prev attribute
Name rationalizations of tabs used during deep-diving
Minor corrections in enabling/disabling logic of tabs = f(prev-tab marker)
State the 'context' in which sektion/students is called ...

New info used in JS to determine the where to write the student list

In fact, 'context' should be specified for any AJAX call that can
be made in - well - different contexts

It is returned as-is by the controller
Shortened text of a main-link
Do nothing if a.brand is clicked
Make sektion/students context aware
[deep-dive]: Don't allow click on 'by student' tab if sektion not selected
First draft of ability to deep-dive by student
Merge branch 'dev'