Reworked IMAP setup flow. Implemented easy way to share protocol log on failure if possible.

Wino.Core/Messages/Mails/ImapSetupBackNavigationRequested.cs

@@ -4,8 +4,9 @@ namespace Wino.Core.Messages.Mails
 {
     /// <summary>
     /// When IMAP setup dialog requestes back breadcrumb navigation.
+    /// Not providing PageType will go back to previous page by doing back navigation.
     /// </summary>
     /// <param name="PageType">Type to go back.</param>
     /// <param name="Parameter">Back parameters.</param>
-    public record ImapSetupBackNavigationRequested(Type PageType, object Parameter);
+    public record ImapSetupBackNavigationRequested(Type PageType = null, object Parameter = null);
 }