Update to make navbar sticky

urbackupserver/www2/src/App.tsx

@@ -227,13 +227,7 @@ const App: React.FunctionComponent = () => {
                   }}
                 >
                   {snap.loggedIn && (
-                    <div
-                      className={styles.item}
-                      style={{
-                        borderRight: "1px solid",
-                        padding: "10pt",
-                      }}
-                    >
+                    <div className={styles.sidebar}>
                       <NavSidebar />
                     </div>
                   )}

urbackupserver/www2/src/components/StackStyles.tsx

@@ -50,4 +50,12 @@ export const useStackStyles = makeStyles({
     maxWidth: "1200px",
     marginInline: "auto",
   },
+  sidebar: {
+    borderRight: "1px solid",
+    padding: "10pt",
+    position: "sticky",
+    top: 0,
+    left: 0,
+    maxHeight: "100vh",
+  },
 });