RFR: 8248381: Create a daemon thread for MonocleTimer

Fri Jun 26 23:55:35 UTC 2020

On Fri, 26 Jun 2020 23:23:43 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> Fixes [JDK-8248381](https://bugs.openjdk.java.net/browse/JDK-8248381).
>
> It looks simple enough for a single reviewer. Since it is in Monocle, @johanvos will probably want to review it.

Note that this is a regression error that is not present in JavaFX 14, so it would be good to fix it before JavaFX 15
is released.

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PR: https://git.openjdk.java.net/jfx/pull/256