facebook-item-view: Populate authoricon_large with a larger avatar picture
facebook-item-view: Populate authoricon_large with a larger avatar picture

Fixes: https://bugs.meego.com/show_bug.cgi?id=17419

GNOME/libsocialweb,ThomasBollmeier/libsocialweb-flickr-oauth,ThomasBollmeier/libsocialweb-flickr-oauth,GNOME/libsocialweb,ThomasBollmeier/libsocialweb-flickr-oauth,GNOME/libsocialweb