Resolves #7819.

Proposed Changes

• Fixes the squished radio buttons / checkboxes for multi-line answers
• Adjusts the line height so the text is not so tight

Testing Instructions

1. Add a quiz with a multiple choice question where some answers span multiple lines.
2. View the quiz with both Learning Mode enabled and not.
3. Ensure the radio button / checkbox for the long answer isn't squished.

Learning Mode

Non-Learning Mode

Pre-Merge Checklist

• PR title and description contain sufficient detail and accurately describe the changes
• Adheres to coding standards (PHP, JavaScript, CSS, HTML)
• All strings are translatable (without concatenation, handles plurals)
• Follows our naming conventions (P6rkRX-4oA-p2)
• Hooks (p6rkRX-1uS-p2) and functions are documented
• New UIs are responsive and use a mobile-first approach
• Code is tested on the minimum supported PHP and WordPress versions