Let user know if the documentation is a redirect page

(closes #3337)

data/core.yaml

@@ -239,6 +239,7 @@ en:
   inspector:
     no_documentation_combination: There is no documentation available for this tag combination
     no_documentation_key: There is no documentation available for this key
+    documentation_redirect: This documentation has been redirected to a new page
     show_more: Show More
     view_on_osm: View on openstreetmap.org
     all_fields: All fields

dist/locales/en.json

@@ -293,6 +293,7 @@
     "inspector": {
         "no_documentation_combination": "There is no documentation available for this tag combination",
         "no_documentation_key": "There is no documentation available for this key",
+        "documentation_redirect": "This documentation has been redirected to a new page",
         "show_more": "Show More",
         "view_on_osm": "View on openstreetmap.org",
         "all_fields": "All fields",

modules/ui/tag_reference.js

@@ -54,7 +54,8 @@ export function uiTagReference(tag) {
 
             body.html('');
 
-            if (!docs || !docs.description) {
+
+            if (!docs || !docs.title) {
                 if (param.hasOwnProperty('value')) {
                     load(_.omit(param, 'value'));   // retry with key only
                 } else {
@@ -64,6 +65,7 @@ export function uiTagReference(tag) {
                 return;
             }
 
+
             if (docs.image && docs.image.thumb_url_prefix) {
                 body
                     .append('img')
@@ -77,7 +79,7 @@ export function uiTagReference(tag) {
 
             body
                 .append('p')
-                .text(docs.description);
+                .text(docs.description || t('inspector.documentation_redirect'));
 
             body
                 .append('a')