Action implemented for translations download

Initialized isLoading

setting isLoading to False finally

moving logic to controller file

removed redundant variable assignments

app/controllers/admin/content/translations.js

@@ -0,0 +1,19 @@
+import Controller from '@ember/controller';
+
+export default Controller.extend({
+  isLoading: false,
+
+  actions: {
+    translationsDownload() {
+      this.set('isLoading', true);
+      this.get('loader')
+        .load('/admin/content/translations/all')
+        .catch(() => {
+          this.get('notify').error(this.get('l10n').t('Unexpected error occurred.'));
+        })
+        .finally(() => {
+          this.set('isLoading', false);
+        });
+    }
+  }
+});

app/routes/admin/content/translations.js

@@ -9,7 +9,7 @@ export default Route.extend({
     return [
       {
         code      : 'en',
-        sourceUrl : this.get('loader').load('/admin/content/translations/all')
+        sourceUrl : '#'
       }
     ];
   }

app/templates/admin/content/translations.hbs

@@ -16,7 +16,7 @@
               {{get l10n.availableLocales language.code}}
             </div>
             <div class="column eight wide">
-              <a href="{{language.sourceUrl}}">{{t 'Download'}}</a>
+              <button href="{{language.sourceUrl}}" {{action 'translationsDownload'}}>{{t 'Download' }}</a>
             </div>
           </div>
         {{/each}}