Revert "Ava UI: Input Menu Refactor (#4998)"

This reverts commit 49b37550ca.

This currently breaks the GTK GUI.

src/Ryujinx.Input/Assigner/GamepadButtonAssigner.cs

@@ -59,16 +59,16 @@ namespace Ryujinx.Input.Assigner
             return _gamepad == null || !_gamepad.IsConnected;
         }
 
-        public ButtonValue? GetPressedButton()
+        public string GetPressedButton()
         {
             IEnumerable<GamepadButtonInputId> pressedButtons = _detector.GetPressedButtons();
 
             if (pressedButtons.Any())
             {
-                return !_forStick ? new(pressedButtons.First()) : new(((StickInputId)pressedButtons.First()));
+                return !_forStick ? pressedButtons.First().ToString() : ((StickInputId)pressedButtons.First()).ToString();
             }
 
-            return null;
+            return "";
         }
 
         private void CollectButtonStats()

src/Ryujinx.Input/Assigner/IButtonAssigner.cs

@@ -31,6 +31,6 @@ namespace Ryujinx.Input.Assigner
         /// Get the pressed button that was read in <see cref="ReadInput"/> by the button assigner.
         /// </summary>
         /// <returns>The pressed button that was read</returns>
-        ButtonValue? GetPressedButton();
+        string GetPressedButton();
     }
 }

src/Ryujinx.Input/Assigner/KeyboardKeyAssigner.cs

@@ -23,7 +23,7 @@ namespace Ryujinx.Input.Assigner
 
         public bool HasAnyButtonPressed()
         {
-            return GetPressedButton() is not null;
+            return GetPressedButton().Length != 0;
         }
 
         public bool ShouldCancel()
@@ -31,20 +31,20 @@ namespace Ryujinx.Input.Assigner
             return _keyboardState.IsPressed(Key.Escape);
         }
 
-        public ButtonValue? GetPressedButton()
+        public string GetPressedButton()
         {
-            ButtonValue? keyPressed = null;
+            string keyPressed = "";
 
             for (Key key = Key.Unknown; key < Key.Count; key++)
             {
                 if (_keyboardState.IsPressed(key))
                 {
-                    keyPressed = new(key);
+                    keyPressed = key.ToString();
                     break;
                 }
             }
 
-            return !ShouldCancel() ? keyPressed : null;
+            return !ShouldCancel() ? keyPressed : "";
         }
     }
 }