RFR: 8352746: [TestBug] Monkey Tester Application Update 5

[Andy Goryachev]

Further additions to the MonkeyTester application:

- platform preferences monitor
- improved pages: hbox, vbox
- improved css playground
- mouse listener option in some context menus
- additional choices: background
- additional properties: Node::clip, Region::shape, TextInputControl::textFormatter
- font selector in Tools -> JTextArea/JTextField Embedded in SwingNode

## New Pages
- anchor pane
- border pane
- button bar
- flow pane
- grid pane
- media player
- progress indicator
- separator
- slider
- stack pane
- stage
- tile pane

## Properties Monitor

![Screenshot 2025-03-31 at 16 18 17](https://github.com/user-attachments/assets/fa4256ab-c58a-4f93-bee1-a9b5236f64a6)

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Commit messages:
 - cleanup
 - whitespace
 - mt update 5

Changes: https://git.openjdk.org/jfx/pull/1750/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1750&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352746
  Stats: 4404 lines in 60 files changed: 4063 ins; 167 del; 174 mod
  Patch: https://git.openjdk.org/jfx/pull/1750.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1750/head:pull/1750

PR: https://git.openjdk.org/jfx/pull/1750