style: put big form in two column

...admin-license-form/admin-license-form.presentational.html

...-client-form/admin-oauth2-client-form.presentational.html

...admin-orgunit-form/admin-orgunit-form.presentational.html

...onals/admin-user-form/admin-user-form.presentational.html

...entationals/deposit-form/deposit-form.presentational.html

...entationals/deposit-form/deposit-form.presentational.scss

...ed-abstract-form/shared-abstract-form.presentational.scss

src/sass/main.scss