Fix #4960 (#5003)

Adjust linked buttons.

Enum MultitouchButtonType is here: https://github.com/supertuxkart/stk-code/blob/master/src/input/multitouch_device.hpp

src/input/multitouch_device.cpp

@@ -266,7 +266,7 @@ void MultitouchDevice::updateDeviceState(unsigned int event_id)
             if (button == NULL)
                 return false;
             return button->type >= BUTTON_FIRE &&
-                button->type <= BUTTON_RESCUE;
+                button->type <= BUTTON_LOOK_BACKWARDS;
         };
 
     const MultitouchEvent& event = m_events[event_id];