add BuildingEditSummaryBrief to Age category

app/src/frontend/building/data-containers/age.tsx

@@ -8,6 +8,7 @@ import TextboxDataEntry from '../data-components/textbox-data-entry';
 import Verification from '../data-components/verification';
 import YearDataEntry from '../data-components/year-data-entry';
 import withCopyEdit from '../data-container';
+import BuildingEditSummaryBrief from '../edit-history/building-edit-summary';
 
 import { CategoryViewProps } from './category-view-props';
 
@@ -22,6 +23,7 @@ const AgeView: React.FunctionComponent<CategoryViewProps> = (props) => {
        ){
       return (
           <Fragment>
+              <BuildingEditSummaryBrief/>
               <YearDataEntry
                   year={props.building.date_year}
                   upper={props.building.date_upper}
@@ -93,6 +95,7 @@ const AgeView: React.FunctionComponent<CategoryViewProps> = (props) => {
       };
     return (
         <Fragment>
+            <BuildingEditSummaryBrief/>
             <YearDataEntry
                 year={props.building.date_year}
                 upper={props.building.date_upper}

app/src/frontend/building/edit-history/building-edit-summary.tsx

@@ -82,6 +82,30 @@ const BuildingEditSummary: React.FunctionComponent<BuildingEditSummaryProps> = (
     );
 };
 
+const BuildingEditSummaryBrief: React.FunctionComponent<BuildingEditSummaryProps> = ({
+    historyEntry,
+    showBuildingId = false,
+    hyperlinkCategories = false
+}) => {
+    const entriesWithMetadata = enrichHistoryEntries(historyEntry.forward_patch, historyEntry.reverse_patch);
+    const entriesByCategory = arrayToDictionary(entriesWithMetadata, x => x.category);
+
+    const categoryHyperlinkTemplate = hyperlinkCategories && historyEntry.building_id != undefined ?
+            `/edit/$category/${historyEntry.building_id}` :
+            undefined;
+
+    return (
+        <div className="edit-history-entry">
+            <h2 className="edit-history-timestamp">Edited on {formatDate(parseDate(historyEntry.revision_timestamp))}</h2>
+        </div>
+    );
+};
+
 export {
     BuildingEditSummary
 };
+
+export {
+    BuildingEditSummaryBrief
+};
+