Fix #331 - empty fields when creating new module

src/app/components/app-setup/app-setup.component.html

src/app/components/app-setup/app-setup.component.scss

src/app/components/app-setup/app-setup.component.ts

...p/components/calculator-list/calculator-list.component.ts

...onents/fieldset-container/fieldset-container.component.ts

src/app/config.json

...formulaire/definition/concrete/form-macrorugo-compound.ts

src/app/formulaire/definition/concrete/form-spp.ts

src/app/formulaire/definition/form-definition.ts

src/app/formulaire/fieldset.ts

src/app/formulaire/formulaire-element.ts

src/app/formulaire/formulaire-node.ts

src/app/services/app-setup.service.ts

src/locale/messages.en.json

src/locale/messages.fr.json