After JDK-8215307 several javadoc pages use different header elements for some of their sections. In most cases the presentation is the same as before, but I noticed the following unintentional changes:

 - In the module-summary page the "Packages" and "Services" headers now use normal instead of italic font style
 - In the class-declaration page h3 headers for inherited methods use plain style instead of dark grey background
 - In the class-use page, h2 headers use plain instead of italic font style

The CSS rules for headers could also use some cleanup and should maybe make use of newly introduced body classes to select page types.