RFR: 8169285: Re-enable javafx.swt tests [v5]

[Marius Hanl]

> This PR enables `javafx.swt` tests for:
> - Windows
> 
> Disabled on:
> - Linux, since some distros seems to have problems
> - MacOS: The following warning is printed right before the error: `***WARNING: Display must be created on main thread due to Cocoa restrictions. Use vmarg -XstartOnFirstThread`

Marius Hanl has updated the pull request incrementally with one additional commit since the last revision:

  link JDK tickets

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Changes:
  - all: https://git.openjdk.org/jfx/pull/1783/files
  - new: https://git.openjdk.org/jfx/pull/1783/files/a0f0cb88..158ac825

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1783&range=04
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1783&range=03-04

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1783.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1783/head:pull/1783

PR: https://git.openjdk.org/jfx/pull/1783