Don't necessarily hide the mouse cursor when full screened.

Since the ShowMouseCursor preference exists we don't want to force hiding the mouse cursor when full screened. Instead let the user/theme decide with ShowMouseCursor.

src/archutils/Win32/GraphicsWindow.cpp

@@ -111,7 +111,8 @@ static LRESULT CALLBACK GraphicsWindow_WndProc( HWND hWnd, UINT msg, WPARAM wPar
 		case WM_SETCURSOR:
 			if( !g_CurrentParams.windowed )
 			{
-				SetCursor(nullptr);
+				//Don't hide the cursor when full screened since we have ShowMouseCursor as an option.
+				//SetCursor(nullptr);
 				return 1;
 			}
 			break;