maven-application-skin does not work in IE7

Revision 440343 of maven-theme.css in maven-application-skin undid revision 430364 - "fix the CSS so that it renders correctly in IE7 and Opera."

Basically the height for #navcolumn li.expanded should be auto.

#navcolumn li.expanded { background-image: url( ../images/super.gif ); height: auto; }

Note: The Archiva and Continuum projects may use this skin.

[1]http://svn.apache.org/viewvc/maven/skins/trunk/maven-application-skin/src/main/resources/css/maven-theme.css?r1=430364&r2=440343&diff_format=h