Features 5084, 5170, 5288 and 5290

This features are :
- some fields can be repeated (for example, instead of creating 5 fields to upload files, it is now possible to create a single field which can be repeated 5 times max)
- form designer is lighter and more ergonomic. Fields are added directly from main page. Furthermore, structure of generated forms have been modernized (list instead of table).
- new field 'address/map'
- new field 'email'