Ground work for Wino Calendar. (#475)

Wino Calendar abstractions.

Wino.Core.UWP/Dialogs/AccountEditDialog.xaml.cs

@@ -0,0 +1,22 @@
+using Windows.UI.Xaml.Controls;
+using Wino.Core.Domain.Entities.Shared;
+
+namespace Wino.Dialogs
+{
+    public sealed partial class AccountEditDialog : ContentDialog
+    {
+        public MailAccount Account { get; private set; }
+        public bool IsSaved { get; set; }
+
+        public AccountEditDialog(MailAccount account)
+        {
+            InitializeComponent();
+            Account = account;
+        }
+
+        private void SaveClicked(ContentDialog sender, ContentDialogButtonClickEventArgs args)
+        {
+            IsSaved = true;
+        }
+    }
+}