Fixed blocks of logo, search and user account

* Fixed the blocks so that if suppose we put blank search block it should not make empty search space.
* Fixed the static url in address-edit template.
Added a new block new_offers n home page #3498

* added new offers area optional using block statement
* added help article category.
* Fixed the link of my cart.
Merge pull request #24 from rahulsukla/develop

Fixed blocks of logo, search and user account