[#1188] Allow organization dropdown to be displayed

The current logic was unclear. If a user belongs to at least one
organization, the dropdown will be displayed, both on the created and
edit forms. Same for the visibility one.

ckan/templates/package/snippets/package_basic_fields.html

@@ -56,8 +56,8 @@
   {% set dataset_has_organization = data.owner_org or data.group_id %}
   {% set organizations_available = h.organizations_available('create_dataset') %}
   {% set user_is_sysadmin = h.check_access('sysadmin') %}
-  {% set show_organizations_selector = organizations_available and (user_is_sysadmin or dataset_is_draft) %}
-  {% set show_visibility_selector = dataset_has_organization or (organizations_available and (user_is_sysadmin or dataset_is_draft)) %}
+  {% set show_organizations_selector = organizations_available %}
+  {% set show_visibility_selector = dataset_has_organization or organizations_available %}
 
   {% if show_organizations_selector and show_visibility_selector %}
     <div data-module="dataset-visibility">