WIP Split composite key user control

Some refactoring

WinAppCommon/ViewModels/Items/SettingsSaveVm.cs

@@ -0,0 +1,25 @@
+using Microsoft.Extensions.DependencyInjection;
+using ModernKeePass.Application.Common.Interfaces;
+using ModernKeePass.Common;
+
+namespace ModernKeePass.ViewModels.ListItems
+{
+    public class SettingsSaveVm
+    {
+        private readonly ISettingsProxy _settings;
+
+        public SettingsSaveVm() : this(App.Services.GetRequiredService<ISettingsProxy>())
+        { }
+
+        public SettingsSaveVm(ISettingsProxy settings)
+        {
+            _settings = settings;
+        }
+
+        public bool IsSaveSuspend
+        {
+            get { return _settings.GetSetting(Constants.Settings.SaveSuspend, true); }
+            set { _settings.PutSetting(Constants.Settings.SaveSuspend, value); }
+        }
+    }
+}