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

client/webpack.config.js

@@ -6,7 +6,8 @@ module.exports = {
         namespaces: ['babel-polyfill', './src/namespaces/root.js'],
         users: ['babel-polyfill', './src/users/root.js'],
         account: ['babel-polyfill', './src/account/root.js'],
-        reports: ['babel-polyfill', './src/reports/root.js']
+        reports: ['babel-polyfill', './src/reports/root.js'],
+        lists: ['babel-polyfill', './src/lists/root.js']
     },
     output: {
         library: 'MailtrainReactBody',