Add redirect for Categories and Tags

client/my-sites/site-settings/settings-writing/index.js

@@ -1,9 +1,20 @@
 import page from '@automattic/calypso-router';
-import { makeLayout, render as clientRender } from 'calypso/controller';
+import {
+	makeLayout,
+	render as clientRender,
+	redirectIfDuplicatedView as _redirectIfDuplicatedView,
+} from 'calypso/controller';
 import { navigation, siteSelection, sites } from 'calypso/my-sites/controller';
 import { setScroll, siteSettings } from 'calypso/my-sites/site-settings/settings-controller';
 import { taxonomies, writing } from './controller';
 
+const redirectIfDuplicatedView = ( context, next ) => {
+	_redirectIfDuplicatedView( `edit-tags.php?taxonomy=${ context.params.taxonomy }` )(
+		context,
+		next
+	);
+};
+
 export default function () {
 	page(
 		'/settings/writing/:site_id',
@@ -20,6 +31,7 @@ export default function () {
 	page(
 		'/settings/taxonomies/:taxonomy/:site_id',
 		siteSelection,
+		redirectIfDuplicatedView,
 		navigation,
 		setScroll,
 		taxonomies,