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

Tue Aug 24 05:15:40 UTC 2021

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.

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Commit messages:
 - Fix
 - Fix

Changes: https://git.openjdk.java.net/jfx/pull/609/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=609&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272779
  Stats: 18 lines in 1 file changed: 13 ins; 0 del; 5 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