Add RewriteTodo to import MD

Author: weissm

OneMore/Commands/File/ImportCommand.cs

@@ -11,6 +11,7 @@ namespace River.OneMoreAddIn.Commands
 	using System;
 	using System.Drawing;
 	using System.IO;
+	using System.Text.RegularExpressions;
 	using System.Threading;
 	using System.Threading.Tasks;
 	using System.Windows.Forms;
@@ -609,6 +610,7 @@ private async Task ImportMarkdownFile(string filepath, CancellationToken token)
 
 					converter = new MarkdownConverter(page);
 					converter.RewriteHeadings();
+					converter.RewriteTodo();
 
 					logger.WriteLine($"updating...");
 					logger.WriteLine(page.Root);