RFR: 8258592: Control labels in Dialogs are truncated at certain DPI scaling levels [v2]

[Kevin Rushforth]

On Thu, 17 Dec 2020 17:14:13 GMT, Jose Pereda <jpereda at openjdk.org> wrote:

>> This PR is a follow up of [JDK-8199592](https://bugs.openjdk.java.net/browse/JDK-8199592). 
>> 
>> When using DPI scaling levels > 1, labels of controls get truncated when they are added to Dialogs which have an owner Window. 
>> 
>> To fix the issue, this PR binds dialog and owner window renderScale X, Y properties.
>> 
>> It also provides a system test that can be tested on Linux and Windows. Before applying the fix, the `Check` text of the checkboxes is rendered as `Che...`. With the fix, the test verifies, for a given UI scale, that the rendered text is `Check` when launching the dialog.
>
> Jose Pereda has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Check that the alert exists

Marked as reviewed by kcr (Lead).

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PR: https://git.openjdk.java.net/jfx/pull/369