Implement Popup location UI

[jaskirat-gill]

What Issue does this PR resolve? (Link to GitHub Issue, approved features and bugs will be given priority) N/A

Please provide a video demo below, or a screenshot and description of the change.

• Implement UI for locations. Adds each unique location in section's section details
• Links to the classroom page on learningspaces.ubc.ca (Ex, learningspaces.ubc.ca/swng-222)
• Moved some styling to SectionComponent.css to hold styling shared between all components in popup

Popup does get pretty long when workday lists a lot of instructors and a lot of locations

Tag reviewers for the PR below.