Add basic Buefy support for App Settings page

also various buttons have been tweaked on some other "master view" pages

tailbone/templates/customers/view.mako

@@ -21,7 +21,9 @@
 
 <%def name="object_helpers()">
   ${parent.object_helpers()}
-  ${view_profiles_helper(instance.people)}
+  % if instance.people:
+      ${view_profiles_helper(instance.people)}
+  % endif
 </%def>
 
 ${parent.body()}