Incorrect rendering of other HTML content when SwingboxJavahelpViewer is installed

[GoogleCodeExporter]

After opening the help window with Swingbox Javahelp Viewer installed, 
rendering of HTML content in other JEditorPane windows is rendered by Swingbox 
which leads to unpredictable behavior.

This issue was reported in Netbeans Plugin Portal issue tracker:
http://netbeans.org/bugzilla/show_bug.cgi?id=226201

Original issue reported on code.google.com by mantl...@gmail.com on 2 Mar 2013 at 3:42