New Client: english translations and misc fixes (#8410)

* misc fixes and add english translations

* add tests

website/client/plugins/i18n.js

@@ -0,0 +1,22 @@
+// Plugin to expose globally a '$t' method that calls common/i18n.t.
+// Can be used in templates.
+
+import i18n from '../../common/script/i18n';
+// Load all english translations
+// TODO it's a workaround until proper translation loading works
+const context = require.context('../../common/locales/en', true, /\.(json)$/);
+const translations = {};
+
+context.keys().forEach(filename => {
+  Object.assign(translations, context(filename));
+});
+
+i18n.strings = translations;
+
+export default {
+  install (Vue) {
+    Vue.prototype.$t = function translateString () {
+      return i18n.t.apply(null, arguments);
+    };
+  },
+};