RFR: 8296387: [Tooltip, CSS] -fx-show-delay is only applied to the first tooltip that is shown before it is displayed [v12]

[Kevin Rushforth]

On Thu, 11 Jul 2024 12:22:16 GMT, Marius Hanl <mhanl at openjdk.org> wrote:

>> This PR fixes a long standing issue where the `Tooltip` will always wait one second until it appears the very first time, even if the 
>> `-fx-show-delay` was set to another value.
>> 
>> The culprit is, that the `cssForced` flag is not inside `Tooltip`, but inside the `TooltipBehaviour`. So the very first `Tooltip` gets processed correctly, but after no `Tooltip` will be processed by CSS before showing, resulting in the set `-fx-show-delay` to not be applied immediately.
>> 
>> Added a bunch of headful and headless tests for the behaviour since there were none before.
>
> Marius Hanl has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Change toBase64(..) to add the base64 part as well

Marked as reviewed by kcr (Lead).

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PR Review: https://git.openjdk.org/jfx/pull/1394#pullrequestreview-2171744334