PrinterOutputModel now has different extruders if it has more than one.

It used to just fill the list with references to the first one created.
CL-541

resources/qml/PrintMonitor.qml

@@ -51,7 +51,7 @@ Column
                 {
                     color: UM.Theme.getColor("sidebar")
                     width: index == machineExtruderCount.properties.value - 1 && index % 2 == 0 ? extrudersGrid.width : Math.floor(extrudersGrid.width / 2 - UM.Theme.getSize("sidebar_lining_thin").width / 2)
-                    extruderModel: activePrinter.extruders[index]
+                    extruderModel:  modelData
                 }
             }
         }