IMAP Improvements (#558)

* Fixing an issue where scrollviewer overrides a part of template in mail list. Adjusted zoomed out header grid's corner radius.

* IDLE implementation, imap synchronization strategies basics and condstore synchronization.

* Adding iCloud and Yahoo as special IMAP handling scenario.

* iCloud special imap handling.

* Support for killing synchronizers.

* Update privacy policy url.

* Batching condstore downloads into 50, using SORT extension for searches if supported.

* Bumping some nugets. More on the imap synchronizers.

* Delegating idle synchronizations to server to post-sync operations.

* Update mailkit to resolve qresync bug with iCloud.

* Fixing remote highest mode seq checks for qresync and condstore synchronizers.

* Yahoo custom settings.

* Bump google sdk package.

* Fixing the build issue....

* NRE on canceled token accounts during setup.

* Server crash handlers.

* Remove ARM32. Upgrade server to .NET 9.

* Fix icons for yahoo and apple.

* Fixed an issue where disabled folders causing an exception on forced sync.

* Remove smtp encoding constraint.

* Remove commented code.

* Fixing merge conflict

* Addressing double registrations for mailkit remote folder events in synchronizers.

* Making sure idle canceled result is not reported.

* Fixing custom imap server dialog opening.

* Fixing the issue with account creation making the previously selected account as selected as well.

* Fixing app close behavior and logging app close.

Wino.Mail/App.xaml.cs

@@ -233,6 +233,7 @@ namespace Wino
             }
             catch (WinoServerException serverException)
             {
+                // TODO: Exception context is lost.
                 var dialogService = Services.GetService<IMailDialogService>();
 
                 dialogService.InfoBarMessage(Translator.Info_SyncFailedTitle, serverException.Message, InfoBarMessageType.Error);
@@ -241,6 +242,8 @@ namespace Wino
 
         protected override async void OnApplicationCloseRequested(object sender, SystemNavigationCloseRequestedPreviewEventArgs e)
         {
+            Log.Information("App close requested.");
+
             var deferral = e.GetDeferral();
 
             // Wino should notify user on app close if: