[jdk16] RFR: JDK-8249633: doclint reports missing javadoc for JavaFX property methods that have a property description [v3]

[Jonathan Gibbons]

> There are two parts to the fix:
> 
> 1. Similar to that of JDK-8251200:  predicate methods in `Utils` used to check if an element has certain tags in its doc comment may trigger the missing comment check even when there does not need to be a comment.
> 
> 2. When synthesizing comments for the property-related methods, the code checks for the existence of explicit comments, in case they exist; that could also trigger the "missing comment" check.
> 
> The fix shares some changes with JDK-8251200; whichever does not go first will need a merge commit.

Jonathan Gibbons has updated the pull request incrementally with one additional commit since the last revision:

  Fix comment typos

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

Changes:
  - all: https://git.openjdk.java.net/jdk16/pull/71/files
  - new: https://git.openjdk.java.net/jdk16/pull/71/files/2f995c1e..67519b8e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk16&pr=71&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk16&pr=71&range=01-02

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk16/pull/71.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16 pull/71/head:pull/71

PR: https://git.openjdk.java.net/jdk16/pull/71