Lists list and CUD

Custom forms list
Updated DB schema (not yet implemented in the server, which means that most of the server is not broken).
- custom forms are independent of a list
- order and visibility of fields is now in custom_fields
- first_name and last_name has been turned to a regular custom field

models/namespaces.js

@@ -151,6 +151,9 @@ async function updateWithConsistencyCheck(context, entity) {
             throw new interoperableErrors.ChangedError();
         }
 
+        // namespaceHelpers.validateEntity is not needed here because it is part of the tree traversal check below
+        await namespaceHelpers.validateMove(context, entity, existing, 'namespace', 'createNamespace', 'delete');
+
         let iter = entity;
         while (iter.namespace != null) {
             iter = await tx('namespaces').where('id', iter.namespace).first();