chore: Second (final) pass through docs / UI strings

Description

Makes a second pass through all of the docs / UI strings, and catches some consistency and style issues I missed in the first big pass.

Related Issues

• Resolves Track holistic UI string cleanup (#7598 - closed) (YAAAAAAAY)
• Related to Experimental features: string cleanup, use vari... (#7599 - closed) and may also close it

How has this been tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation
• Chore (Related to CI or Packaging to platforms)
• Test gap