RFR: 8185831: Pseudo selectors do not appear to work in Node.lookupAll() [v9]

[Sai Pradeep Dandem]

> **Issue:**
> Using pseudo classes in programmatic query using Node.lookupAll() or Node.lookup() gives unexpected results.
> 
> **Cause:**
> There is no check for checking the psuedo states matching in the applies() method of SimpleSelector.java. So checking for "applies()" alone is not sufficient in lookup() method.
> 
> **Fix:**
> Included an extra check for the psuedo states to match.

Sai Pradeep Dandem has updated the pull request incrementally with two additional commits since the last revision:

 - Minor change
 - Updated documentation in regards with pseudo states lookup

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

Changes:
  - all: https://git.openjdk.org/jfx/pull/1245/files
  - new: https://git.openjdk.org/jfx/pull/1245/files/b0afe7eb..96a891a5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1245&range=08
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1245&range=07-08

  Stats: 14 lines in 1 file changed: 14 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1245.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1245/head:pull/1245

PR: https://git.openjdk.org/jfx/pull/1245