Rework the description of the PassFailJFrame class by adding a section that describes its features. For example, <h2>Features</h2>.

Each feature could be separated into <h3>-header for clarity and easier linking.

Currently, each paragraph has an anchor. Using a more structured description with heading or a list could be clearer.


This would facilitate adding a section to describe forcePass() and forceFail() methods, JDK-8355515.