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

[Jonathan Gibbons]

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.

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

Changes: https://git.openjdk.java.net/jdk/pull/2065/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2065&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8259723
  Stats: 58 lines in 24 files changed: 8 ins; 44 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2065.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2065/head:pull/2065

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