Lots of code refactoring to use XAML behaviors instead of code-behind

New Save button in the AppBar
EntryPage now uses the same AppBar as GroupPage (but not shared...)
Some new Symbol mappings

ModernKeePass/Common/DatabaseHelper.cs

@@ -33,7 +33,12 @@ namespace ModernKeePass.Common
             }
         }
         
-
+        /// <summary>
+        /// Open a KeePass database
+        /// </summary>
+        /// <param name="password">The database password</param>
+        /// <param name="createNew">True to create a new database before opening it</param>
+        /// <returns>An error message, if any</returns>
         public string Open(string password, bool createNew = false)
         {
             var key = new CompositeKey();
@@ -65,6 +70,10 @@ namespace ModernKeePass.Common
             return string.Empty;
         }
 
+        /// <summary>
+        /// Save the current database to another file and open it
+        /// </summary>
+        /// <param name="file">The new database file</param>
         internal void Save(StorageFile file)
         {
             DatabaseFile = file;
@@ -72,12 +81,18 @@ namespace ModernKeePass.Common
             Status = DatabaseStatus.Opened;
         }
 
+        /// <summary>
+        /// Commit the changes to the currently opened database to file
+        /// </summary>
         public void Save()
         {
             if (_pwDatabase != null && _pwDatabase.IsOpen)
                 _pwDatabase.Save(new NullStatusLogger());
         }
 
+        /// <summary>
+        /// Close the currently opened database
+        /// </summary>
         public void Close()
         {
             _pwDatabase?.Close();

ModernKeePass/Common/MessageDialogHelper.cs

@@ -0,0 +1,35 @@
+using System;
+using Windows.UI.Popups;
+using Windows.UI.Xaml.Controls;
+using ModernKeePass.Interfaces;
+using ModernKeePass.ViewModels;
+
+namespace ModernKeePass.Common
+{
+    public static class MessageDialogHelper
+    {
+        public static async void ShowDeleteConfirmationDialog(string text, IPwEntity model, Frame backFrame)
+        {
+            // Create the message dialog and set its content
+            var messageDialog = new MessageDialog(text);
+
+            // Add commands and set their callbacks; both buttons use the same callback function instead of inline event handlers
+            messageDialog.Commands.Add(new UICommand("Delete", delete =>
+            {
+                ToastNotificationHelper.ShowUndoToast(model);
+                model.MarkForDelete();
+                if (backFrame.CanGoBack) backFrame.GoBack();
+            }));
+            messageDialog.Commands.Add(new UICommand("Cancel"));
+
+            // Set the command that will be invoked by default
+            messageDialog.DefaultCommandIndex = 1;
+
+            // Set the command to be invoked when escape is pressed
+            messageDialog.CancelCommandIndex = 1;
+
+            // Show the message dialog
+            await messageDialog.ShowAsync();
+        }
+    }
+}

ModernKeePass/Common/ToastNotificationHelper.cs

@@ -4,12 +4,13 @@ using Windows.Data.Xml.Dom;
 using Windows.UI.Notifications;
 using Windows.UI.Xaml;
 using ModernKeePass.Interfaces;
+using ModernKeePass.ViewModels;
 
 namespace ModernKeePass.Common
 {
     public static class ToastNotificationHelper
     {
-        public static /*async*/ void ShowUndoToast(string entityType, IPwEntity entity)
+        public static /*async*/ void ShowUndoToast(IPwEntity entity)
         {
             // This is for Windows 10
             // Construct the visuals of the toast
@@ -64,6 +65,8 @@ namespace ModernKeePass.Common
             var toast = new ToastNotification(toastXml) {ExpirationTime = DateTime.Now.AddSeconds(5)};
             toast.Dismissed += Toast_Dismissed;
             */
+
+            var entityType = entity is GroupVm ? "Group" : "Entry";
             var notificationXml = ToastNotificationManager.GetTemplateContent(ToastTemplateType.ToastText02);
             var toastElements = notificationXml.GetElementsByTagName("text");
             toastElements[0].AppendChild(notificationXml.CreateTextNode($"{entityType} {entity.Name} deleted"));