Changed action button border colours so that there is just one pixel light top
left and one pixel dark bottom right border, and changed focus rectangle to
light blue
Action button: Added option to bold text on a zero or non-zero PV value
Action button: added code to put text on button underneath icon if there is more space there
Action button: explicitly set label background colour to fix bug where it doesn't update when the alarm severity changes
Fix alarm colours so that background and foreground colours are saved when
they are changed, and that the figureOKStatus is saved in edit mode as well
as run mode so that checking alarm state doesn't lose your saved colours