Show a message on the History Panel if the feature is new

(closes #4975)

data/core.yaml

@@ -325,6 +325,7 @@ en:
       key: H
       title: History
       selected: "{n} selected"
+      no_history: "No History (New Feature)"
       version: Version
       last_edit: Last Edit
       edited_by: Edited By

dist/locales/en.json

@@ -407,6 +407,7 @@
                 "key": "H",
                 "title": "History",
                 "selected": "{n} selected",
+                "no_history": "No History (New Feature)",
                 "version": "Version",
                 "last_edit": "Last Edit",
                 "edited_by": "Edited By",

modules/ui/panels/history.js

@@ -96,8 +96,8 @@ export function uiPanelHistory(context) {
 
 
     function redraw(selection) {
-        var selected = _filter(context.selectedIDs(), function(e) { return context.hasEntity(e); }),
-            singular = selected.length === 1 ? selected[0] : null;
+        var selected = _filter(context.selectedIDs(), function(e) { return context.hasEntity(e); });
+        var singular = selected.length === 1 ? selected[0] : null;
 
         osm = context.connection();
 
@@ -112,6 +112,13 @@ export function uiPanelHistory(context) {
 
         var entity = context.entity(singular);
 
+        if (!entity.version) {
+            selection
+                .append('div')
+                .text(t('info_panels.history.no_history'));
+            return;
+        }
+
         var list = selection
             .append('ul');