cubicweb-massmailing #4457904 allow to specify a sender in the form/controller [validation pending]

prioritynormal
typebug
done in0.1.0
load0.500
load left0.000
closed by#14d7adf96696 [views] allow to specify sender (closes #4457904)
patch[views] allow to specify sender (closes #4457904) [applied]