MXGDA-808 allow permanent enable/disable of a NumberBox
MXGDA-808 make uneditable and invalid values italic
MXGDA-808 only change font style, not anything else
Merge branch '1.1'

Conflicts:
	uk.ac.gda.common.rcp/src/uk/ac/gda/richbeans/components/scalebox/NumberBox.java