RFR: 8158801: [TEST_BUG] Mixing tests fail because of focus workaround trick [v40]

[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 59 additional commits since the last revision:

 - Merge branch 'openjdk:master' into jdk-8158801
 - Cleans up code for move visibility
 - Cleans up code and adds missed import
 - Removes MULTI_FRAME_TEST instance variable and cleans up code
 - Organizes imports
 - Initialized MULTI_FRAMES_TEST using a method
 - Removes uncessary latch count down
 - Update test/jdk/java/awt/Mixing/AWT_Mixing/GlassPaneOverlappingTestBase.java
   
   Co-authored-by: Alexey Ivanov <alexey.ivanov at oracle.com>
 - Makes multiFramesTest final and code readibility better
 - Update test/jdk/java/awt/Mixing/AWT_Mixing/SimpleOverlappingTestBase.java
   
   Co-authored-by: Alexey Ivanov <alexey.ivanov at oracle.com>
 - ... and 49 more: https://git.openjdk.org/jdk/compare/a1d23536...d5e2613f

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25971/files
  - new: https://git.openjdk.org/jdk/pull/25971/files/c5fd2279..d5e2613f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25971&range=39
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25971&range=38-39

  Stats: 30136 lines in 1033 files changed: 15145 ins; 9189 del; 5802 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