UI: Option to automatically Hide UI when game launches

Quality of life feature. Removes the need to manually hide UI every time the game launches

src/Ryujinx/UI/ViewModels/MainWindowViewModel.cs

@@ -488,6 +488,19 @@ namespace Ryujinx.Ava.UI.ViewModels
             }
         }
 
+        public bool StartGamesWithoutUI
+        {
+            get => ConfigurationState.Instance.UI.StartNoUI;
+            set
+            {
+                ConfigurationState.Instance.UI.StartNoUI.Value = value;
+
+                ConfigurationState.Instance.ToFileFormat().SaveConfig(Program.ConfigurationPath);
+
+                OnPropertyChanged();
+            }
+        }
+
         public bool ShowConsole
         {
             get => ConfigurationState.Instance.UI.ShowConsole;
@@ -1192,6 +1205,11 @@ namespace Ryujinx.Ava.UI.ViewModels
             StartGamesInFullscreen = !StartGamesInFullscreen;
         }
 
+        public void ToggleStartGamesWithoutUI()
+        {
+            StartGamesWithoutUI = !StartGamesWithoutUI;
+        }
+
         public void ToggleShowConsole()
         {
             ShowConsole = !ShowConsole;