RFR: 8252238: TableView: Editable (pseudo-editable) cells should respect the row editability [v2]

[Jeanette Winzenburg]

On Tue, 22 Jun 2021 06:28:49 GMT, Marius Hanl <mhanl at openjdk.org> wrote:

>> This PR enables Tree- and TableCells to also check the row editability when an edit should happen. With this a Tree- or TableCell is not editable, when the row where the cell is in is not.
>> 
>> While this PR fixes the problem described in the ticket, it does not fix the example.
>> This is due the example uses the **CheckBoxTableCell**, which is a ready-to-use subclass of **TableCell**. 
>> 
>> While looking into this, I found out that multiple sub implementations still have this issue, but the fix is not always the same, e.g. CheckBoxTableCell should disable the CheckBox (in **updateItem**), while the ChoiceBoxTableCell should check the row editability in the **startEdit** method (like this PR does).
>> 
>> I created a follow-up issues for fixing all the sub Tree- and TableCell implementation which do not count the row editability in:
>> [JDK-8268295](https://bugs.openjdk.java.net/browse/JDK-8268295)
>
> Marius Hanl has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Addressed review comments

Marked as reviewed by fastegal (Reviewer).

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PR: https://git.openjdk.java.net/jfx/pull/529