Merge branch 'updates-covers-rebased' into updates-production
Remove duplicated background.
Remove resource name from the url.

Css resources are loaded as relative to their location, so when the url start
with for example "++theme++telesur.theme" this end making a request like this:
 - htp://www.telesurtv.net/++theme++telesur.theme/css/++theme++telesur.theme/img/pestana-ultimos-hover.png
thats work only by acquisition but end in a duplicated request.
Remove resource theme name from background url.
Merge branch 'cleanup' into staging-production