RFR: 8264127: ListCell editing status is true, when index changes while editing [v14]

[Florian Kirmaier]

> Fixing ListCell editing status is true, when index changes while editing.

Florian Kirmaier has updated the pull request incrementally with two additional commits since the last revision:

 - 8264127
   fixed assertion text,
   exception handler is now installed/uninstalled like in TableCellTest
 - 8264127
   fixed trailing whitespace

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

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/441/files
  - new: https://git.openjdk.java.net/jfx/pull/441/files/1fa3738a..ba5dc2e0

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=441&range=13
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=441&range=12-13

  Stats: 16 lines in 2 files changed: 13 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jfx/pull/441.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/441/head:pull/441

PR: https://git.openjdk.java.net/jfx/pull/441