RFR: 8169187: [macosx] Aqua: java/awt/image/multiresolution/MultiresolutionIconTest.java [v4]

[Alisen Chung]

> Removed darkening of icons on button press in Aqua to match other L&Fs. The icon darkening was causing this test to fail on MacOS.
> 
> The test is passing on all platforms after this change.

Alisen Chung has updated the pull request incrementally with one additional commit since the last revision:

  reverted changes to AquaButtonUI

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/9436/files
  - new: https://git.openjdk.org/jdk/pull/9436/files/8a626c96..d35a2fd4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9436&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9436&range=02-03

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/9436.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9436/head:pull/9436

PR: https://git.openjdk.org/jdk/pull/9436