RFR: 8305768: Unify WindowContext in glass-gtk

Sat Apr 8 00:58:57 UTC 2023

This unifies and organizes WindowContext of the glass-gtk.

It does not change any behaviour, just reorganizes the code.

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Commit messages:
 - Unify WindowContext
 - Unify window contexts
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - ... and 29 more: https://git.openjdk.org/jfx/compare/0c03a411...b846ed21

Changes: https://git.openjdk.org/jfx/pull/1085/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1085&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305768
  Stats: 1472 lines in 5 files changed: 559 ins; 657 del; 256 mod
  Patch: https://git.openjdk.org/jfx/pull/1085.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1085/head:pull/1085

PR: https://git.openjdk.org/jfx/pull/1085