fixed lack of label for the site/category

Author: Oaphi

app/views/users/_prefs.html.erb

@@ -11,8 +11,10 @@
         <input class="js-user-pref" type="checkbox" data-pref="<%= name %>" <%= 'checked' if value == 'true' %>
                data-community="<%= community %>" />
       <% when 'choice' %>
-        <%= select_tag nil, options_for_select(preference_choice(pref_config), selected: value),
-                       include_blank: true, class: 'js-user-pref form-element', data: { pref: name, community: community } %>
+        <%= select_tag nil,
+                       options_for_select(preference_choice(pref_config), selected: value),
+                       class: 'js-user-pref form-element',
+                       data: { pref: name, community: community } %>
       <% when 'integer' %>
         <input class="js-user-pref form-element" type="number" data-pref="<%= name %>" value="<%= value %>"
                data-community="<%= community %>" />
@@ -22,4 +24,4 @@
       <% end %>
     </div>
   </div>
-<% end %>
+<% end %>

config/config/preferences.yml

@@ -38,6 +38,8 @@ default_license:
     Your choice of default license. This will override site and category default licensing.
   default: ~
   choice:
+    - name: Site or category default
+      value: ~
     - name: CC BY-SA 4.0
       value: CC BY-SA 4.0
     - name: CC BY 4.0