RFR: 8158801: [TEST_BUG] Mixing tests fail because of focus workaround trick [v43]

[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 65 additional commits since the last revision:

 - Merge branch 'openjdk:master' into jdk-8158801
 - Removes uncessary import and adds blank lines between import blocks
 - Makes inherited method final
 - Removes unnecessary URL
 - Fixes a typo
 - Removes unncessary boolean variable, line and import
 - 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
 - ... and 55 more: https://git.openjdk.org/jdk/compare/ef4717f7...91d688ef

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25971/files
  - new: https://git.openjdk.org/jdk/pull/25971/files/cee5e622..91d688ef

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25971&range=42
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25971&range=41-42

  Stats: 142009 lines in 1322 files changed: 121698 ins; 11760 del; 8551 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