Fix typo and missnaming.

osu.Game/Graphics/UserInterface/KeyCounter.cs

@@ -91,7 +91,7 @@ namespace osu.Game.Graphics.UserInterface
                 }
             };
             //Set this manually because an element with Alpha=0 won't take it size to AutoSizeContainer,
-            //so the size can be changing between buttonSpirit and glowSpirit.
+            //so the size can be changing between buttonSprite and glowSprite.
             Height = buttonSprite.Height;
             Width = buttonSprite.Width;
         }

osu.Game/Graphics/UserInterface/KeyCounterKeyboard.cs

@@ -7,10 +7,10 @@ using osu.Framework.Input;
 
 namespace osu.Game.Graphics.UserInterface
 {
-    public class KeyCounterKeyBoard : KeyCounter
+    public class KeyCounterKeyboard : KeyCounter
     {
         public Key Key { get; }
-        public KeyCounterKeyBoard(string name, Key key) : base(name)
+        public KeyCounterKeyboard(string name, Key key) : base(name)
         {
             Key = key;
         }