Canceling authentication and Outlook improvements (#367)

* Cancellation support for getting responses from the server.

* Adding cancel button for account creation dialog initialization.

* Prevent invalid outlook message types like contact, calendar event or todo item.

* Remove debug launcher options.

Wino.Core/Authenticators/GmailAuthenticator.cs

@@ -123,7 +123,6 @@ namespace Wino.Core.Authenticators
 
             try
             {
-                //await _authorizationCompletionSource.Task.WaitAsync(_authorizationCancellationTokenSource.Token);
                 responseRedirectUri = await _nativeAppService.GetAuthorizationResponseUriAsync(this, authorizationUri);
             }
             catch (Exception)