RFR: 8264127: ListCell editing status is true, when index changes while editing [v2]

[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:
   removed accidentally commited line
 - 8264127:
   Added another test for ListCell, now when updating the index of the ListCell to the editingIndex

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Changes:
  - all: https://git.openjdk.java.net/jfx/pull/441/files
  - new: https://git.openjdk.java.net/jfx/pull/441/files/a40b0253..e2f12cb0

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=441&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=441&range=00-01

  Stats: 14 lines in 1 file changed: 14 ins; 0 del; 0 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