Add 'or None' to the doc for argument 'widget' in gui's controls
Add 'or None' to the doc for argument 'widget' in gui's controls

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