First steps towards rbZoom

Conflicts:
	src-plugins/v3dView/v3dView.cpp
-Solves the lost of control of focus over containers
-Improves rbzoom activation
-keyevent from qvtkwidget are sent to medMainWindow enabling the
activation of shortcut via keypressevent and keypressrelease

Conflicts:
	app/medInria/medApplication.cpp
	src-plugins/v3dView/v3dView.cpp
Small changes