Make warn JButton transparent (best L&F)
Make warn JButton transparent (best L&F)

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1340113 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: c8c508840c1b45a362e81c8962d90579f50e9e6e
apache/jmeter,benbenw/jmeter,apache/jmeter,benbenw/jmeter,ham1/jmeter,etnetera/jmeter,ham1/jmeter,ham1/jmeter,benbenw/jmeter,etnetera/jmeter,etnetera/jmeter,ham1/jmeter,benbenw/jmeter,ham1/jmeter,etnetera/jmeter,apache/jmeter,apache/jmeter,etnetera/jmeter,apache/jmeter