RFR: 8199592: Control labels truncated at certain DPI scaling levels [v2]

[Kevin Rushforth]

On Fri, 20 Nov 2020 11:30:18 GMT, Jose Pereda <jpereda at openjdk.org> wrote:

>> As commented in the [JBS issue](https://bugs.openjdk.java.net/browse/JDK-8199592), the default UI scale 1.0 is used to perform initial calculations of preferred sizes of the scene, even if the scale has already a different value (i.e 175%). As a workaround, calling `Stage::sizeToScene` fix it, as it forces to do new calculations but now with the correct UI scale.
>> 
>> This PR moves the call to `Window::updateOutputScales` before the scene initialization takes place, so the UI scale is correctly set for the initial preferred size of the scene, and no workaround is required.
>> 
>> 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`.
>
> Jose Pereda has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Use assertTrue instead of try-catch

Marked as reviewed by kcr (Lead).

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PR: https://git.openjdk.java.net/jfx/pull/351