<AWT Dev> RFR: 8251123: doclint warnings about missing javadoc tags and comments [v2]

[Sergey Bylokhov]

> We have a number of missing javadoc tags and comments in the desktop module.
> Most of the missing comments are related to the serialized form.
> 
> The fix:
>   - Adds missing comments to the non-static/non-transient fields(even private) of the "serializable" classes
>   - Adds comments to the "serializable" classes even if those classes are non-public
>   - Fixes references/adds missing tags to the special methods(like readObject/writeObject)
>   - Delete the java.awt.PeerFixer class.
> 
> I need advice about what exact change should be reviewed in  the CSR(except PeerFixer removal)
> 
> Note that in some cases I added the comments to the "implementation details", so I did not specify it fully.
> 
> The old review request:
> https://mail.openjdk.java.net/pipermail/beans-dev/2020-August/000423.html

Sergey Bylokhov has updated the pull request incrementally with two additional commits since the last revision:

 - Update ScrollPane.java
 - Update based on the feedback

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/369/files
  - new: https://git.openjdk.java.net/jdk/pull/369/files/cfc1df5d..c1d83696

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=369&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=369&range=00-01

  Stats: 52 lines in 3 files changed: 49 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/369.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/369/head:pull/369

PR: https://git.openjdk.java.net/jdk/pull/369