Merge remote-tracking branch 'origin/master' into WIP_improve_initialization

plugins/UM3NetworkPrinting/ClusterUM3OutputDevice.py

@@ -148,6 +148,10 @@ class ClusterUM3OutputDevice(NetworkedPrinterOutputDevice):
     def selectPrinter(self, target_printer: str = "") -> None:
         self._sending_job.send(target_printer)
 
+    @pyqtSlot()
+    def cancelPrintSelection(self) -> None:
+        self._sending_gcode = False
+
     ##  Greenlet to send a job to the printer over the network.
     #
     #   This greenlet gets called asynchronously in requestWrite. It is a

plugins/UM3NetworkPrinting/PrintWindow.qml

@@ -90,6 +90,7 @@ UM.Dialog
             onClicked: {
                 base.visible = false;
                 printerSelectionCombobox.currentIndex = 0
+                OutputDevice.cancelPrintSelection()
             }
         }
     ]