RFR: JDK-8259723: Move Table class to formats.html package

[Jonathan Gibbons]

On Wed, 13 Jan 2021 18:44:41 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

> Please review this change to just move two classes from one package to another. The move was done as a single simple IDE operation, which also had a not-unwelcome side-effect of cleaning up some unrelated imports.
> 
> The change is an indirect consequence of the recent change to use the new `HtmlId` and `HtmlIds` classes, which introduced an undesirable package dependence in the `Table` class.
> 
> The changes are just to move the classes and update imports. There are no functional changes.

A not-reasonable extension of this change would be to move `TableHeader` to be a nested class in `Table` itself, `Table.Header`, or maybe `Table.Head`.

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PR: https://git.openjdk.java.net/jdk/pull/2065