Merge pull request #809 from ioanpocol/devel

LB-1881 - As a user, I want to generate HTML with several different them...
LB-1881 Multiple SEO configs
LB-1881 Multiple SEO configs

Some UI changes
Merge pull request #810 from vladnicoara/seo-themes

LB-1881 Multiple Seo themes
LB-1893 - Change the name of the generated file