Clean up of widget.py
Clean up of widget.py

kwikadi/orange3,marinkaz/orange3,qPCR4vir/orange3,qusp/orange3,marinkaz/orange3,cheral/orange3,marinkaz/orange3,qPCR4vir/orange3,qusp/orange3,qPCR4vir/orange3,qPCR4vir/orange3,cheral/orange3,marinkaz/orange3,kwikadi/orange3,qusp/orange3,kwikadi/orange3,marinkaz/orange3,kwikadi/orange3,kwikadi/orange3,qPCR4vir/orange3,cheral/orange3,qusp/orange3,cheral/orange3,kwikadi/orange3,cheral/orange3,cheral/orange3,qPCR4vir/orange3,marinkaz/orange3