upgrade to rsyntaxtextarea 2.5.0

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1526023 13f79535-47bb-0310-9956-ffa450edef68
upgrade to rsyntaxtextarea 2.5.0

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1526024 13f79535-47bb-0310-9956-ffa450edef68