Improved image appearance in quiz multiple choice and image choice question types.

[kimcoleman]

Description

Some landscape images in the quiz description were displaying outside the bounds of the column.

This PR also fixes the appearance of the image choice question type where image choices are displayed in columns and the height wasn't resizing proportionally.

Fixes #2588

How has this been tested?

Locally.

Screenshots

Before and After:

Types of changes

Bug fix (non-breaking change which fixes an issue)

Checklist:

• [x] This PR requires and contains at least one changelog file. <!-- To create a changelog yml file: npm run dev changelog add -- -i and follow the prompt. See also: https://github.com/gocodebox/lifterlms/blob/trunk/packages/dev/README.md#changelog-add -->
• [x] My code has been tested.
• [x] My code passes all existing automated tests.
• [x] My code follows the LifterLMS Coding & Documentation Standards.