Doing an orientation change while in splitview mode and closing VKB causes QGraphicsView to be incorrectly resized.

Steps to repro:
1) Build and run the attached application
2) Turn the device into landscape orientation
3) Tap on the lineedit to launch VKB in splitscreen mode
4) Tun the device into portrait orientation
5) Close the VKB

--> Observe the application only occupying ~half the screen when it should be fullscreen.

The underlying reason is that the m_splitViewResizeBy variable in QCoeFepInputContext::resetSplitViewWidget (src/gui/inputmethod/qcoefepinputcontext_s60.cpp) was set while the device was still in landscape mode, and therefore the final size of underlying QGraphicsView will be incorrect if VKB gets closed in different orientation.