Hamburger button state is now correct (no more double clicks) but it's a bit hacky

Changed Help tooltip location in New Database Settings page
Suggest Save As when opening DB when another is opened and there is a save error

ModernKeePass/Views/UserControls/HamburgerMenuUserControl.xaml

@@ -60,7 +60,7 @@
             <RowDefinition Height="*" />
         </Grid.RowDefinitions>
         <StackPanel Orientation="Horizontal">
-            <ToggleButton Style="{StaticResource HamburgerToggleButton}" Unchecked="ToggleButton_OnUnchecked">
+            <ToggleButton Style="{StaticResource HamburgerToggleButton}" IsChecked="{Binding IsOpen, ElementName=UserControl}" Unchecked="ToggleButton_OnUnchecked">
                 <interactivity:Interaction.Behaviors>
                     <core:EventTriggerBehavior EventName="Checked">
                         <core:GoToStateAction StateName="Expanded" />

ModernKeePass/Views/UserControls/HamburgerMenuUserControl.xaml.cs

@@ -99,6 +99,18 @@ namespace ModernKeePass.Views.UserControls
                 typeof(HamburgerMenuUserControl),
                 new PropertyMetadata(-1, (o, args) => { }));
         
+        public bool IsOpen
+        {
+            get { return (bool)GetValue(IsOpenProperty); }
+            set { SetValue(IsOpenProperty, value); }
+        }
+        public static readonly DependencyProperty IsOpenProperty =
+            DependencyProperty.Register(
+                nameof(IsOpen),
+                typeof(bool),
+                typeof(HamburgerMenuUserControl),
+                new PropertyMetadata(false, (o, args) => { }));
+
         public ICommand ActionButtonCommand
         {
             get { return (ICommand)GetValue(ActionButtonCommandProperty); }

ModernKeePass/Views/UserControls/OpenDatabaseUserControl.xaml

@@ -78,6 +78,7 @@
             </VisualStateGroup>
         </VisualStateManager.VisualStateGroups>
         <interactivity:Interaction.Behaviors>
+            <!-- TODO: Correct the Runtime template binding error (even though it is actually working as intended) -->
             <core:DataTriggerBehavior Binding="{Binding IsError}" Value="True">
                 <core:GoToStateAction StateName="Error"/>
             </core:DataTriggerBehavior>