Admin settings => WIP

client/src/app/admin/admin-routing.module.ts

client/src/app/admin/components/index.ts

.../app/admin/components/settings/form-option.component.html

...rc/app/admin/components/settings/form-option.component.ts

.../app/admin/components/settings/form-select.component.html

...rc/app/admin/components/settings/form-select.component.ts

client/src/app/admin/components/settings/index.ts

.../app/admin/components/settings/option-list.component.html

...rc/app/admin/components/settings/option-list.component.ts

...p/admin/components/settings/select-buttons.component.html

...app/admin/components/settings/select-buttons.component.ts

.../app/admin/components/settings/select-list.component.html

.../app/admin/components/settings/select-list.component.scss

...rc/app/admin/components/settings/select-list.component.ts

...src/app/admin/containers/settings/settings.component.html

...t/src/app/admin/containers/settings/settings.component.ts

client/src/app/app.reducer.ts

client/src/app/custom-route-serializer.ts

.../src/app/metamodel/store/actions/select-option.actions.ts

client/src/app/metamodel/store/actions/select.actions.ts