fix download progress bar. (#439)

Author: Livinglist

lib/screens/widgets/download_progress_reminder.dart

@@ -69,6 +69,8 @@ class _DownloadProgressReminderState extends State<DownloadProgressReminder>
                   const Spacer(),
                   LinearProgressIndicator(
                     value: progress,
+                    color:
+                        Theme.of(context).colorScheme.primary.withOpacity(0.5),
                   ),
                 ],
               ),