Improved interaction with "Input" settings.

- paired devices have notifications that they are configured and require connection
- paired devices load the configuration when connected
- A notification appears when changing control configuration settings.
- Now control settings will be saved only when they are changed
- Added a button to roll back changes to the previously saved state
- Fixed a bug: when switching the "player", if the "input device" and "controller type" settings were changed, the save dialog box did not appear.
- "Motion", "Rumble" and "Led" also have events notifying about changes

src/Ryujinx/UI/Views/Input/KeyboardInputView.axaml.cs

@@ -73,7 +73,7 @@ namespace Ryujinx.Ava.UI.Views.Input
                         if (e.ButtonValue.HasValue)
                         {
                             Button buttonValue = e.ButtonValue.Value;
-                            viewModel.ParentModel.IsModified = true;
+                            FlagInputConfigChanged();
 
                             switch (button.Name)
                             {
@@ -184,6 +184,11 @@ namespace Ryujinx.Ava.UI.Views.Input
             }
         }
 
+        private void FlagInputConfigChanged()
+        {
+            (DataContext as KeyboardInputViewModel)!.ParentModel.IsModified = true;
+        }
+
         private void MouseClick(object sender, PointerPressedEventArgs e)
         {
             bool shouldUnbind = e.GetCurrentPoint(this).Properties.IsMiddleButtonPressed;