Bug 55459 - Elements using ComboStringEditor lose the input value if user selects another Test Element
Rollback change using Editor to access value
Replace requestFocus() by requestFocusInWindow()
Bugzilla Id: 55459

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1516145 13f79535-47bb-0310-9956-ffa450edef68