Fixed popup size not changing to show more items or less when changing the number of items in `ComboBox` by adding a `popupResize` variable which triggers a request layout when there is change in items list. Tested with the test app in bug and MonkeyTester.
------------- Commit messages: - Merge branch 'openjdk:master' into 8325564.popupSize - Merge branch 'openjdk:master' into 8325564.popupSize - Fixed ComboBox popup size not changing after update. Changes: https://git.openjdk.org/jfx/pull/2052/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=2052&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8325564 Stats: 22 lines in 2 files changed: 19 ins; 0 del; 3 mod Patch: https://git.openjdk.org/jfx/pull/2052.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/2052/head:pull/2052 PR: https://git.openjdk.org/jfx/pull/2052
