Replace JTextArea by JSyntaxTextArea
Replace JTextArea by JSyntaxTextArea

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1531701 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: e41c2180340fb376f33b7c540f985fe9e5aadbe3
etnetera/jmeter,apache/jmeter,benbenw/jmeter,etnetera/jmeter,apache/jmeter,ham1/jmeter,ham1/jmeter,apache/jmeter,apache/jmeter,etnetera/jmeter,benbenw/jmeter,etnetera/jmeter,benbenw/jmeter,ham1/jmeter,etnetera/jmeter,benbenw/jmeter,ham1/jmeter,apache/jmeter,ham1/jmeter