[Rev 01] RFR: 8240692: Cleanup of the javafx property objects

[Nir Lisker]

> A simple readability cleanup for the files that were changed in #113.
> 
> Note that the boolean property has an `instanceof` check that doesn't exist in the other properties.

Nir Lisker has updated the pull request incrementally with one additional commit since the last revision:

  Revert changes of anonymous classes usage

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

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/141/files
  - new: https://git.openjdk.java.net/jfx/pull/141/files/15f50f17..6876a037

Webrevs:
 - full: https://webrevs.openjdk.java.net/jfx/141/webrev.01
 - incr: https://webrevs.openjdk.java.net/jfx/141/webrev.00-01

  Stats: 111 lines in 5 files changed: 100 ins; 1 del; 10 mod
  Patch: https://git.openjdk.java.net/jfx/pull/141.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/141/head:pull/141

PR: https://git.openjdk.java.net/jfx/pull/141