Change history: show a placeholder when change history is empty.

src/components/GenericChangeHistory.tsx

@@ -96,6 +96,7 @@ export default function GenericChangeHistory(props: PropsType) {
 
   return (
     <List style={{ height: "100%" }}>
+      {(entriesList.length > 0) ? (
         <AutoSizer>
           {({ height, width }) => (
             <VirtualizedList
@@ -107,6 +108,11 @@ export default function GenericChangeHistory(props: PropsType) {
             />
           )}
         </AutoSizer>
+      ) : (
+        <ListItem
+          primaryText="No entries found"
+        />
+      )}
     </List>
   );
 }