[Rev 05] RFR: 8176270: Adding ChangeListener to TextField.selectedTextProperty causes StringOutOfBoundsException

[Robert Lichtenberger]

> This PR fixes JDK-8176270 by clamping the end index of the selected text to the length of the text.

Robert Lichtenberger has updated the pull request incrementally with one additional commit since the last revision:

  8176270: Adding ChangeListener to TextField.selectedTextProperty causes StringOutOfBoundsException
  
  Move replaceSelectionAtEndWithListener test to general test class.
  Add a more general test for selection/text properties and replace/undo/redo operations.

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Changes:
  - all: https://git.openjdk.java.net/jfx/pull/138/files
  - new: https://git.openjdk.java.net/jfx/pull/138/files/533774fe..660335bf

Webrevs:
 - full: https://webrevs.openjdk.java.net/jfx/138/webrev.05
 - incr: https://webrevs.openjdk.java.net/jfx/138/webrev.04-05

  Stats: 71 lines in 3 files changed: 44 ins; 27 del; 0 mod
  Patch: https://git.openjdk.java.net/jfx/pull/138.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/138/head:pull/138

PR: https://git.openjdk.java.net/jfx/pull/138