i18n issues and LanguagePicker

.gitignore

jams-react-client/package.json

jams-react-client/public/available_languages.json

jams-react-client/src/components/CreateAdmin/CreateAdmin.js

jams-react-client/src/components/Drawer/Drawer.js

...client/src/components/IdentityManagement/AdStorageForm.js

...ent/src/components/IdentityManagement/LocalStorageForm.js

...ct-client/src/components/LanguagePicker/LanguagePicker.js

...lient/src/components/ServerParameters/ServerParameters.js

jams-react-client/src/i18n.js

jams-react-client/src/layouts/Admin.js

jams-react-client/src/layouts/SignIn.js

jams-react-client/src/locales/ar/translation.json

jams-react-client/src/locales/be/translation.json

jams-react-client/src/locales/bg/translation.json

jams-react-client/src/locales/bn/translation.json

jams-react-client/src/locales/ca/translation.json

jams-react-client/src/locales/cs_CZ/translation.json

jams-react-client/src/locales/da/translation.json

jams-react-client/src/locales/de/translation.json