Response Body is not formatted correctly (View Results Tree) v5.4.1

**Brian Tully** ([Bug 65187](https://bz.apache.org/bugzilla//show_bug.cgi?id=65187&redirect=false)):
As of JMeter 5.4.1 on a Mac, when viewing the response body for a request in the View Results Tree, there is no longer a code-formatted monospace "view source" display when "Text" or "HTML Source Formatted" are selected as the filter. In previous versions of JMeter, one would see a "view source" look and feel, where line numbers were displayed and the response body was rendered in a monospace font and "preformatted" . In 5.4.1 this is no longer the case -- there are no line numbers and the response body text is not monospace or "preformatted" when either "Text" or "HTML Source Formatted" is selected.

Created attachment [Jmeter-5_4_1-ViewResultsTree-unformatted-response-body2.png](https://apache.github.io/jmeter-bugzilla-attachments/87/65187/37772/Jmeter-5_4_1-ViewResultsTree-unformatted-response-body2.png): Response Body unformatted - HTML Source Formatted

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