add hash before build nr, fix typo

frontend/lib/screens/build_screen.dart

@@ -233,7 +233,7 @@ class _BuildScreenState extends State<BuildScreen> {
             ),
             SideCard(
               title: "Build Number",
-              textRight: buildData.id.toString(),
+              textRight: "#${buildData.id}",
             ),
             SideCard(
               title: "Version",

frontend/lib/utils/time_formatter.dart

@@ -8,7 +8,7 @@ extension TimeFormatter on DateTime {
     if (duration.inSeconds < 60) {
       return '${duration.inSeconds} Second${_s(duration.inSeconds)} ago';
     } else if (duration.inMinutes < 60) {
-      return '${duration.inMinutes} Minute${_s(duration.inMinutes)})} ago';
+      return '${duration.inMinutes} Minute${_s(duration.inMinutes)} ago';
     } else if (duration.inHours < 24) {
       return '${duration.inHours} Hour${_s(duration.inHours)} ago';
     } else if (duration.inDays < 30) {