RFR: 8310885: Width/height of window is not set after calling sizeToScene [v2]

[Guillaume Tâche]

> `setHeight()` / `setWidth()` were ignored if called after `sizeToScene()` and before `show()`.      
> Now the `sizeToScene` flag is unset in these methods to ensure the right values are set when the window is shown.

Guillaume Tâche has updated the pull request incrementally with one additional commit since the last revision:

  8310885: Fixes review comment

-------------

Changes:
  - all: https://git.openjdk.org/jfx/pull/1195/files
  - new: https://git.openjdk.org/jfx/pull/1195/files/b06049aa..fd3fb463

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1195&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1195&range=00-01

  Stats: 8 lines in 1 file changed: 0 ins; 4 del; 4 mod
  Patch: https://git.openjdk.org/jfx/pull/1195.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1195/head:pull/1195

PR: https://git.openjdk.org/jfx/pull/1195