RFR: 8274932: Render scales in EmbeddedWindow are not properly updated [v4]

[Prasanta Sadhukhan]

> When the JavaFX scene is set before it is really shown, then the scale factors are not properly propagated to the EmbeddedWindow, resulting in showing wrong scales.
> Fix is made to update scales to EmbeddedWindow

Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:

  Fix to get correct scale in secondary monitor

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Changes:
  - all: https://git.openjdk.org/jfx/pull/1171/files
  - new: https://git.openjdk.org/jfx/pull/1171/files/3689422d..6bfb624c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1171&range=03
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1171&range=02-03

  Stats: 16 lines in 1 file changed: 3 ins; 1 del; 12 mod
  Patch: https://git.openjdk.org/jfx/pull/1171.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1171/head:pull/1171

PR: https://git.openjdk.org/jfx/pull/1171