Translate admin side of the site: more translations

config/services.yaml

src/Admin/ConfigurationContributionsAdmin.php

src/Admin/ConfigurationCustomJsCssAdmin.php

src/Admin/ConfigurationFormAdmin.php

src/Admin/ConfigurationInfoBarAdmin.php

src/Admin/ConfigurationMapAdmin.php

src/Admin/ConfigurationMarkerAdmin.php

src/Admin/ConfigurationMenuAdmin.php

src/Admin/ConfigurationMobileAdmin.php

src/Admin/FeatureConfigurationAdmin.php

...admin/core_custom/custom-fields/filters-builder.html.twig

...admin/core_custom/custom-fields/viewport-picker.html.twig

templates/admin/partials/show_element_form_fields.html.twig

translations/admin+intl-icu.fr.yaml