add aria landmark role to search form
add aria landmark role to search form

see spec http://www.w3.org/TR/wai-aria/roles#search

This helps citizens using assistive technology
navigate the application

relates to issue #2210

4bic/alaveteli,nzherald/alaveteli,andreicristianpetcu/alaveteli,andreicristianpetcu/alaveteli,4bic/alaveteli,Br3nda/alaveteli,andreicristianpetcu/alaveteli_old,4bic/alaveteli,nzherald/alaveteli,nzherald/alaveteli,4bic/alaveteli,andreicristianpetcu/alaveteli,nzherald/alaveteli,petterreinholdtsen/alaveteli,andreicristianpetcu/alaveteli_old,petterreinholdtsen/alaveteli,nzherald/alaveteli,Br3nda/alaveteli,Br3nda/alaveteli,andreicristianpetcu/alaveteli,petterreinholdtsen/alaveteli,andreicristianpetcu/alaveteli_old,andreicristianpetcu/alaveteli_old,petterreinholdtsen/alaveteli,Br3nda/alaveteli,andreicristianpetcu/alaveteli_old,petterreinholdtsen/alaveteli,andreicristianpetcu/alaveteli,4bic/alaveteli,Br3nda/alaveteli