RFR: 8272779: Package docs for javafx.embed.swing are misleading [v2]

[Prasanta Sadhukhan]

> The API docs for the javafx.embed.swing package are misleading in that they only talk about the JFXPanel capability (embedding a JavaFX Scene in a Swing JComponent) and ignore the SwingNode functionality entirely. 
> Fix the package doc.

Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:

  Fix

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

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/609/files
  - new: https://git.openjdk.java.net/jfx/pull/609/files/88b9b285..dd60daad

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=609&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=609&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jfx/pull/609.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/609/head:pull/609

PR: https://git.openjdk.java.net/jfx/pull/609