RFR: 8158801: [TEST_BUG] Mixing tests fail because of focus workaround trick [v26]

[Khalid Boulanouare]

> Many Mixing tests failed because the work around click lands on the minimizing area in the window control and causes the tests to fail.
> 
> This fix changes the width of base frames which allows most of tests to pass.

Khalid Boulanouare has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 40 additional commits since the last revision:

 - Merge branch 'openjdk:master' into jdk-8158801
 - Merge branch 'openjdk:master' into jdk-8158801
 - Centers missed frames in the middle of screen
 - Uses KeyboardFocusManager instead of FocusManager
 - Reverted not needed changes
 - Updates copyright years
 - Merge branch 'openjdk:master' into jdk-8158801
 - Centers frames in the middle of the screen
 - Releses latch in case of null ancestor or resizing component
 - Update test/jdk/java/awt/Mixing/AWT_Mixing/GlassPaneOverlappingTestBase.java
   
   Co-authored-by: Alexey Ivanov <alexey.ivanov at oracle.com>
 - ... and 30 more: https://git.openjdk.org/jdk/compare/ab9a8cc1...7b46aef4

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25971/files
  - new: https://git.openjdk.org/jdk/pull/25971/files/9358a9d8..7b46aef4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25971&range=25
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25971&range=24-25

  Stats: 6465 lines in 270 files changed: 3082 ins; 2414 del; 969 mod
  Patch: https://git.openjdk.org/jdk/pull/25971.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25971/head:pull/25971

PR: https://git.openjdk.org/jdk/pull/25971