RFR: 8294254: [macOS] javax/swing/plaf/aqua/CustomComboBoxFocusTest.java failure [v2]

[Damon Nguyen]

> The previous change to AquaComboBoxUI had 1 pixel of overlap between the text field and the combo button. This caused a few pixels to darken sometimes when an editable combobox is displayed. Since this test passes sometimes and fails some other times, it was not initially detected.
> 
> Since these few darkening pixels occur due to the change in AquaComboBoxUI, no reasonable change to the test could really be made, and the change would need to be to the class for the combobox. This fix was tested with a high count repeat and no failures occurred for various macOS systems.
> 
> Also removing the test from the problem list.

Damon Nguyen has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains four commits:

 - Merge branch 'master' into 8294254/overlapFixEditableCombobox
 - Merge branch 'openjdk:master' into 8294254/overlapFixEditableCombobox
 - Remove test from problem list
 - Adjust rect width to remove overlap

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Changes: https://git.openjdk.org/jdk/pull/10626/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10626&range=01
  Stats: 3 lines in 2 files changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/10626.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10626/head:pull/10626

PR: https://git.openjdk.org/jdk/pull/10626