Radio buttons for manual QC states

[kasbaker]

Feature request: It's easy to accidentally change a manual QC state by using the scroll wheel when hovering over it and it is also a bit awkward to have to click twice when choosing a manual QC state. Radio buttons would be preferred since it is only one click per sweep and easy to see visually what the option that you selected was.

[kasbaker]

I think the easiest way to do this would be to replace ComboxBoxDelegate with a radio button delegate in delegates.py and then make the appropriate changes in sweeptableview.py.