Update bower dependencies, fix redraw regression

- In Mithril, `finally` has been removed from promise objects as it is not part of the ES spec. See https://gist.github.com/jish/e9bcd75e391a2b21206b for info on the substitute.
- Fix a regression introduced in e5a7013 which broke some redraws

js/admin/src/components/BasicsPage.js

@@ -145,7 +145,8 @@ export default class BasicsPage extends Component {
       .then(() => {
         app.alerts.show(this.successAlert = new Alert({type: 'success', children: app.translator.trans('core.admin.basics.saved_message')}));
       })
-      .finally(() => {
+      .catch(() => {})
+      .then(() => {
         this.loading = false;
         m.redraw();
       });