RFR: WIP: 8236651: Simplify and update glass gtk backend

Tue Jan 28 17:48:05 UTC 2020

On Tue, 14 Jan 2020 11:30:49 GMT, Thiago Milczarek Sayao <tsayao at openjdk.org> wrote:

>> I understand. Will do that when the code works 100%. I have submitted the PR to avoid duplicated efforts and let people test it (if anyone is willing).
> 
> Sizing and positioning completed and fairly tested.
> 
> Will look into mouse grabbing.

To anyone willing to test this, here is a binary test-release for linux:

https://github.com/tsayao/jfx/releases/tag/test-glass-gtk

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PR: https://git.openjdk.java.net/jfx/pull/77