RFR: 8306648: Update the JavaDocs to show the NEW section and DEPRECATED versions

[Nir Lisker]

Adds the javadoc commands to generate the NEW page and to be able to select versions in the DEPRECATED page.

-------------

Commit messages:
 - Added 'since' releases for the New and Deprecated pages

Changes: https://git.openjdk.org/jfx/pull/1109/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1109&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306648
  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1109.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1109/head:pull/1109

PR: https://git.openjdk.org/jfx/pull/1109