Toolkit eventListener leaks memory

Another memory leak reported by NetBeans team. Invisible JEditorPane may be referenced from java.awt.Toolkit. Chain of references:

private static java.awt.Toolkit java.awt.Toolkit.toolkit->
sun.awt.windows.WToolkit@1c7c9eb-eventListener->
java.awt.Toolkit$ToolkitEventMulticaster@4f82c2-b->
java.awt.Toolkit$SelectiveAWTEventListener@8811f9-listener->
java.awt.LightweightDispatcher@af1a01-mouseEventTarget->
org.openide.text.QuietEditorPane@89cf1b