RFR: 8209788: Left/Right/Ctrl+A keys not working in editor of ComboBox if popup showing [v7]

[Jeanette Winzenburg]

On Thu, 27 Aug 2020 23:21:28 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> 
> 
> If the ComboBox is not editable, it will have the effect of making the HOME and END keys no-ops, which is a (possibly
> unwanted) change in behavior. I checked a couple native Windows apps and they have the behavior I would expect: the
> arrow keys, and the HOME / END keys navigate the text field for editable combo boxes. HOME and END go to the beginning
> or end of the list for non-editable combo boxes.  While we could treat that as a follow-up issue, it would be worth
> thinking about whether we could limit the change to editable combo boxes.

outch .. how did I overlook that .. (seems reviewing doesn't belong to my strengths ;)

This fix should not break (correct) existing behavior, so back to thinking ..

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PR: https://git.openjdk.java.net/jfx/pull/172