Fix news mh-group not working

Created by: flora8984461

to Fix https://github.com/EclipseFdn/hugo-solstice-theme/issues/175

and it's a combination with https://github.com/EclipseFdn/jquery-eclipsefdn-api/pull/30 and https://github.com/jakartaee/jakarta.ee/pull/922

Signed-off-by: Yi Liu yi.liu@eclipse-foundation.org