ODPSH-81: Applies layout changes according to Mockup

ckanext/odsh/helpers.py

ckanext/odsh/i18n/de/LC_MESSAGES/ckanext-odsh.mo

ckanext/odsh/i18n/de/LC_MESSAGES/ckanext-odsh.po

ckanext/odsh/plugin.py

ckanext/odsh/public/odsh.css

ckanext/odsh/templates/macros/form.html

ckanext/odsh/templates/package/base_form_page.html

ckanext/odsh/templates/package/new_resource.html

...odsh/templates/package/snippets/package_basic_fields.html

ckanext/odsh/templates/package/snippets/package_form.html

ckanext/odsh/templates/package/snippets/resource_form.html