The extruder manager was too late to catch the initial global stack switch and machine switch. Now it just always reloads the extruders at the beginning.
Contributes to issues CURA-1278 and CURA-351.
The result of the function was None, but I don't need None to be called whenever extruders changed. I need the function itself to be called.
Contributes to issues CURA-1278 and CURA-351.
Hasn't been tested much because there is no display for this in the front-end yet. It needs a setting data type to go with in order to display it. This model is for the drop-down boxes to select an extruder to print, for instance, the support with.
Contributes to issues CURA-1278 and CURA-351.
