Fix KMZ overlays and add map export

MauiProgram.cs

@@ -23,6 +23,7 @@ public static class MauiProgram
         builder.Services.AddSingleton<NetworkLocationService>();
         builder.Services.AddSingleton<AzureMapsService>();
         builder.Services.AddSingleton<ProjectStorageService>();
+        builder.Services.AddSingleton<MapExportService>();
 
 #if DEBUG
         builder.Services.AddBlazorWebViewDeveloperTools();