- added listing of custom fields in form editor
- ability to delete a custom field
- mades changes to the form editor in order to accomodate for the new custom fields system
- fix form editor bugs
- cleanup
- new form with default data
- load/save in form editor
- widgets -> settings form
- widgets -> shortcode for subscribers count
- widgets -> form rendering
- added useful filters to Subscribers (for status related search)
- refactor & cleanup
- improved MailPoet ajax to fix token issue
- added js validation and ajax submit in public.js
- add util security to generate tokens
- updated router to use new util security
- added jquery-validation module
- update public config in webpack config
- added error messages in form
- added public js code to handle validation and ajax submit
- added widget initializer
- added form widget
- added acceptance test for adding the widget
- reorganized jquery validation lib to include languages
- added Widget initializer class
- fixed cache method in initializer
- added widget front JS to validate and submit (ajax / post)
