Bug 395334, allow noautohide panels to have a parent so they that float and move with their parent, also fixes
bug 395123, r=josh,roc,sr=roc
http://www.mozilla.org
ftp://ftp.mozilla.org
http://www.mozilla.org
http://www.mozilla.org/newlayout/samples/test2.html
http://www.mozilla.org/newlayout/samples/test8.html
http://www.mozilla.org/newlayout/samples/test6.html
http://www.mozilla.org/newlayout/samples/test8.html