update gl-menu rule to include the classes form the portal-globalnav li

[pigeonflight]

<replace css:theme-children="nav.gl-menu">
          <xsl:for-each css:select="ul#portal-globalnav li">
            <a><xsl:attribute name="class"><xsl:value-of select="./@class"/> w-nav-link gl-menu-link
              </xsl:attribute><xsl:attribute name="href"><xsl:value-of select="./a/@href" /></xsl:attribute>
              <xsl:copy-of select="./a/text()" /></a>
            </xsl:for-each>
        </replace>

[pigeonflight]

this has been implemented