Make sure messages get jump_to_id URLs rewritten.

Step navigation and submission for new mentoring block

of current step (and its children).

navigating to next step.

New version of mentoring block that supports explicit steps

Assessment targeted review

Making question checkmark display question-level feedback + tests

Fix: Translate links in table column headers

in column headers.

correctly in the LMS.

Simplify get_message: Return message instead of template

Instructor Tool: Support searching for answers from multiple users

Add unit tests for instructor tool

field containers.

previous PR (https://github.com/open-craft/problem-builder/pull/47).

The new tests check if:

- preferred block attrs are used when building block tree for current course
- block tree excludes pb-choice blocks
- blocks are correctly marked as (in)eligible
- new-style keys are handled correctly
- student_view passes calls rendering method with correct template args
- author_view and studio_view show appropriate messages

Don't cause a 500 error in the LMS if get_block unexpectedly returns None

Add an extra selector to fix CSS rule ambiguity