RFR: 8303478: DatePicker throws uncatchable exception on tab out from garbled text [v2]

[brunesto]

> The fix prevents the DatePicker from losing focus if the date is not parsable.

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

  replaced robot test by plain junit

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Changes:
  - all: https://git.openjdk.org/jfx/pull/1274/files
  - new: https://git.openjdk.org/jfx/pull/1274/files/43c0f940..7e2361a5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1274&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1274&range=00-01

  Stats: 244 lines in 2 files changed: 30 ins; 214 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1274.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1274/head:pull/1274

PR: https://git.openjdk.org/jfx/pull/1274