[Rev 01] RFR: 8233040: ComboBoxPopupControl: remove eventFilter for F4

[Jeanette Winzenburg]

The pull request has been updated with additional changes.

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

Added commits:
 - df3de536: changed as requested per review

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/28/files
  - new: https://git.openjdk.java.net/jfx/pull/28/files/2f015406..df3de536

Webrevs:
 - full: https://webrevs.openjdk.java.net/jfx/28/webrev.01
 - incr: https://webrevs.openjdk.java.net/jfx/28/webrev.00-01

  Issue: https://bugs.openjdk.java.net/browse/JDK-8233040
  Stats: 23 lines in 2 files changed: 21 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jfx/pull/28.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/28/head:pull/28

PR: https://git.openjdk.java.net/jfx/pull/28