Implement FW specific ibus event handler

We need our own implementation of the ibus event handler that works
with Views. This event handler interacts between a root site and
the IbusKeyboardAdaptor/IBus.

This code came from Eberhard initially.

Conflicts:

	Build/mkall.targets

Change-Id: I558f1ac7182319624d0b0c304798e4c60bf0fcd3