RFR: 8341281: Root TreeItem with null value breaks TreeTableView [v3]

[Andy Goryachev]

On Tue, 27 May 2025 14:03:15 GMT, Ziad El Midaoui <zelmidaoui at openjdk.org> wrote:

>> When the Root TreeItem is set to null, need to relayout to show the children items
>
> Ziad El Midaoui has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Merge remote-tracking branch 'origin/8341281.RootTreeItem' into 8341281.RootTreeItem
>  - Headfull Test added

tests/system/src/test/java/test/robot/javafx/scene/treetableview/TreeTableViewChangeRootTest.java line 160:

> 158:         }
> 159:     }
> 160: }

missing newline

(it's always a good idea to go through the files once the PR is created)

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PR Review Comment: https://git.openjdk.org/jfx/pull/1767#discussion_r2109548816