PyS60

When the hangup key is pressed, the interpreter exits immediately, thereby
possibly crashing while doing internal cleanup on native resources that
should have been closed.

This patch simply ignores the EndKeyCloseEvent, which results in python
being switched to the background (at least on my device). Note that after
installation you might have to reboot your device before the change is
effective due to dlls being cached in memory.

Perhaps an attribute could be added to appuifw.app to make the behaviour
user configurable.