Finally a nicer looking and working TextBoxWithButton (inspired from the SearchButton)

SearchBox field style improved

WinAppCommon/Controls/TextBoxWithButton.cs

@@ -1,10 +1,11 @@
 using System;
+using System.Windows.Input;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 
 namespace ModernKeePass.Controls
 {
-    public class TextBoxWithButton : TextBox
+    public class TextBoxWithButton : Control
     {
         public event EventHandler<RoutedEventArgs> ButtonClick;
 
@@ -15,7 +16,7 @@ namespace ModernKeePass.Controls
         }
         public static readonly DependencyProperty ButtonSymbolProperty =
             DependencyProperty.Register(
-                "ButtonSymbol",
+                nameof(ButtonSymbol),
                 typeof(string),
                 typeof(TextBoxWithButton),
                 new PropertyMetadata("&#xE107;", (o, args) => { }));
@@ -27,11 +28,46 @@ namespace ModernKeePass.Controls
         }
         public static readonly DependencyProperty ButtonTooltipProperty =
             DependencyProperty.Register(
-                "ButtonTooltip",
+                nameof(ButtonTooltip),
                 typeof(string),
                 typeof(TextBoxWithButton),
                 new PropertyMetadata(string.Empty, (o, args) => { }));
 
+        public string Text
+        {
+            get { return (string)GetValue(TextProperty); }
+            set { SetValue(TextProperty, value); }
+        }
+        public static readonly DependencyProperty TextProperty =
+            DependencyProperty.Register(
+                nameof(Text),
+                typeof(string),
+                typeof(TextBoxWithButton),
+                new PropertyMetadata(string.Empty, (o, args) => { }));
+        public string PlaceholderText
+        {
+            get { return (string)GetValue(PlaceholderTextProperty); }
+            set { SetValue(PlaceholderTextProperty, value); }
+        }
+        public static readonly DependencyProperty PlaceholderTextProperty =
+            DependencyProperty.Register(
+                nameof(PlaceholderText),
+                typeof(string),
+                typeof(TextBoxWithButton),
+                new PropertyMetadata(string.Empty, (o, args) => { }));
+        
+        public ICommand ButtonCommand
+        {
+            get { return (ICommand)GetValue(ButtonCommandProperty); }
+            set { SetValue(ButtonCommandProperty, value); }
+        }
+        public static readonly DependencyProperty ButtonCommandProperty =
+            DependencyProperty.Register(
+                nameof(ButtonCommand),
+                typeof(ICommand),
+                typeof(TextBoxWithButton),
+                new PropertyMetadata(null, (o, args) => { }));
+
         public bool IsButtonEnabled
         {
             get { return (bool)GetValue(IsButtonEnabledProperty); }
@@ -44,6 +80,11 @@ namespace ModernKeePass.Controls
                 typeof(TextBoxWithButton),
                 new PropertyMetadata(true, (o, args) => { }));
         
+
+        public TextBoxWithButton()
+        {
+            DefaultStyleKey = typeof(TextBoxWithButton);
+        }
         protected override void OnApplyTemplate()
         {
             base.OnApplyTemplate();

WinAppCommon/ViewModels/UserControls/TopMenuVm.cs

@@ -0,0 +1,20 @@
+using System.Collections.Generic;
+using MediatR;
+using ModernKeePass.Application.Database.Queries.GetDatabase;
+using ModernKeePass.Application.Group.Models;
+using ModernKeePass.Application.Group.Queries.GetAllGroups;
+
+namespace ModernKeePass.ViewModels
+{
+    public class TopMenuVm
+    {
+        public IEnumerable<GroupVm> Groups { get; set; }
+        public string SelectedDestinationGroup { get; set; }
+
+        public TopMenuVm(IMediator mediator)
+        {
+            var database = mediator.Send(new GetDatabaseQuery()).GetAwaiter().GetResult();
+            Groups = mediator.Send(new GetAllGroupsQuery { GroupId = database.RootGroupId }).GetAwaiter().GetResult();
+        }
+    }
+}

WinAppCommon/ViewModels/ViewModelLocator.cs

@@ -63,6 +63,7 @@ namespace ModernKeePass.ViewModels
             SimpleIoc.Default.Register<SettingsSecurityVm>();
             SimpleIoc.Default.Register<OpenDatabaseControlVm>();
             SimpleIoc.Default.Register<SetCredentialsVm>();
+            SimpleIoc.Default.Register<TopMenuVm>();
             SimpleIoc.Default.Register<MainVm>();
             SimpleIoc.Default.Register<NewVm>();
             SimpleIoc.Default.Register<OpenVm>();
@@ -80,6 +81,7 @@ namespace ModernKeePass.ViewModels
         public SettingsSecurityVm SettingsSecurity => ServiceLocator.Current.GetInstance<SettingsSecurityVm>(Guid.NewGuid().ToString());
         public OpenDatabaseControlVm OpenDatabaseControl => ServiceLocator.Current.GetInstance<OpenDatabaseControlVm>(Guid.NewGuid().ToString());
         public SetCredentialsVm SetCredentials => ServiceLocator.Current.GetInstance<SetCredentialsVm>(Guid.NewGuid().ToString());
+        public TopMenuVm TopMenu => ServiceLocator.Current.GetInstance<TopMenuVm>(Guid.NewGuid().ToString());
         public NewVm New => ServiceLocator.Current.GetInstance<NewVm>(Guid.NewGuid().ToString());
         public OpenVm Open => ServiceLocator.Current.GetInstance<OpenVm>(Guid.NewGuid().ToString());
         public RecentVm Recent => ServiceLocator.Current.GetInstance<RecentVm>(Guid.NewGuid().ToString());

WinAppCommon/WinAppCommon.projitems

@@ -55,6 +55,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)ViewModels\SaveVm.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModels\UserControls\OpenDatabaseControlVm.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModels\UserControls\SetCredentialsVm.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ViewModels\UserControls\TopMenuVm.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModels\ViewModelLocator.cs" />
   </ItemGroup>
 </Project>