minor bug fix
Made verticals/topics context aware

Whether or not to show # of questions and what the relevant count
is depends on the who is asking and in what context.

Only examiners are shown the # of questions on a topic.
And when the context is 'addhints', then only the # of questions authored
by them on that topic
Temporarily hiding courses from students

However, courses will be visible to Admins logging into a student account
[Temp]: Made space in question auditing framework to add hints ..

Code for adding/removing/editing hints follows
Minor change to annotations
Initial commit of ability to add hints (max. 3) for a question subpart ...

Hints should be version-agnostic and preferably predominantly TeX
Added ability to specify hints for question subparts