Sanitize Response Test-Failure Output & Debug Display

[brodriguez8774]

A lot of progress has been made on "test-failure output and debug display" but it's still not quite 100% "correct".

Still need to:

• Verify that newline spacing is consistent and equal between all output sections.
• Add GET/POST values to their own display subsections (includes adding settings to enable/disable showing these. Enabled by default).
• Output such as for header/context variables should be new-line sanitized as well. With any new lines truncated to a single space, probably? Currently new lines in these header/context values seem a bit misleading/confusing for output display.
• Update LiveTestCase error handling to display as similarly as possible to IntegrationTestCase` output.

NOTE: Some of the above points might be large enough to warrant a separate issue. Writing them here for now, and they can be expanded to single issues later if deemed appropriate.