Display section topic if different from course title

[acalog]

Fixes #{issue-number}.

Changes proposed in this pull request

Required pull requests to merge (usually a pull request on Foundation or a plugin)

Test sites

Clone these sites to your sandbox, and review them briefly. Does everything work as expected?

• Writing Program Schedule https://acalog.cms-devl.bu.edu/writingprogram/schedule/

Review checklist

• I have tested my changes in my sandbox on Responsive Framework and at least one child theme.
• I have tested any new filters or action hooks I have introduced in a child theme to ensure they work correctly.
• I've reviewed the contribution guidelines.
• I've updated CHANGELOG.MD with a brief explanation of the changes in this pull request in the unreleased section.
• My code follows BU Coding Standards.

[smtierneybu]

I am fine with the markup, it is inline with existing patterns.