Bug 42248 - Undo-redo support on Test Plan tree modification
Disable feature by default as it is still in ALPHA MODE
Mention this in changes.xml
Bugzilla Id: 42248

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1628260 13f79535-47bb-0310-9956-ffa450edef68