RFR: 8295653: Add a graph of the sealed class hierarchy for marked classes [v2]

[Magnus Ihse Bursie]

On Wed, 19 Oct 2022 21:00:06 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

>> I'm not that familiar with css syntax. Can you be more concrete on how you wish this written?
>
> I'm suggesting something like the following, although I have not explicitly tested it:
> 
> 
> .module-graph span, .sealed-graph span {
>     display:none;
>     position:absolute;
> }
> .module-graph:hover span, .sealed-graph:hover span {
>     display:block;
>      margin: -100px 0 0 100px;
>      z-index: 1;
>  }

Fixed. Thank you for helping me with the CSS syntax. I have verified that it looks good for both existing module graphs and the new sealed graphs.

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PR: https://git.openjdk.org/jdk/pull/10761