This is a much simpler fix for JDK-8384806 which does not have any side effects.
This restores the old code with only a one line change instead. For reference, see https://github.com/openjdk/jfx/commit/8d917ae738120e12ac12cd0957879b7c00e59b03. We now fix the issue by clearing the cell with `buttonCell.updateIndex(-1);` as using `buttonCell.setItem(null);` was causing the original issue when the item was already null. --------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - Add comment - Implement much easier null value fix Changes: https://git.openjdk.org/jfx/pull/2179/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=2179&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8385666 Stats: 69 lines in 2 files changed: 55 ins; 0 del; 14 mod Patch: https://git.openjdk.org/jfx/pull/2179.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/2179/head:pull/2179 PR: https://git.openjdk.org/jfx/pull/2179
