Setting .value creates a new Python attribute in the object. Setting with setProperty creates the setting property, like we wanted.
Contributes to issue CURA-2011.
Due to a gnawing feeling in the back of my head, I tested this with an UM2 and adding settings failed there. This fixes it.
Contributes to issue CURA-2011.
Upon adding the setting (making it visible) it takes the setting from the support extruder stack. It doesn't update afterwards.
Contributes to issue CURA-2011.