RFR: JDK-8242649 : improve the CSS class names used for summary and details tables

[Hannes Wallnoefer]

> Am 24.04.2020 um 16:43 schrieb Jonathan Gibbons <jonathan.gibbons at oracle.com>:
> 
> 
> I'll fix the Table {@code tag.  There's a certain irony there, giving this week's discovery in the jfr code ;-)

Indeed :) 

I’m fine with keeping those methods, just wanted to mention it.

Hannes