This issue [JDK-8264157](https://bugs.openjdk.java.net/browse/JDK-8264157) is a regression of [JDK-8209788](https://bugs.openjdk.java.net/browse/JDK-8209788), which removed two KeyMappings from `ComboBoxListViewBehavior`. That removal was not required to fix [JDK-8209788](https://bugs.openjdk.java.net/browse/JDK-8209788). Reverting `ComboBoxListViewBehavior.java` fixes the regression. Fix includes a new test which fails before and pass with the fix.
------------- Commit messages: - revert partial fix and add test Changes: https://git.openjdk.java.net/jfx/pull/485/files Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=485&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8264157 Stats: 69 lines in 2 files changed: 67 ins; 0 del; 2 mod Patch: https://git.openjdk.java.net/jfx/pull/485.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/485/head:pull/485 PR: https://git.openjdk.java.net/jfx/pull/485
