News container: load only images that are needed

Hide the image containers so that the responsive image script does not add img tags to places they are not needed.

Should reduce the number of loaded images by ~7 on mobile.

![ ](http://1.bp.blogspot.com/-PL2pz2Xsc3Q/Ut1Xwi6HvKI/AAAAAAABFWg/4hLDY-WZVsk/s1600/twitter-in-real-life.gif)