Fixed connection label state

CL-541

cura/PrinterOutputDevice.py

@@ -64,6 +64,12 @@ class PrinterOutputDevice(QObject, OutputDevice):
 
         self._connection_state = ConnectionState.closed
 
+        self._address = ""
+
+    @pyqtProperty(str, constant = True)
+    def address(self):
+        return self._address
+
     def materialHotendChangedMessage(self, callback):
         Logger.log("w", "materialHotendChangedMessage needs to be implemented, returning 'Yes'")
         callback(QMessageBox.Yes)

plugins/USBPrinting/USBPrinterOutputDevice.py

@@ -44,6 +44,7 @@ class USBPrinterOutputDevice(PrinterOutputDevice):
 
         self._serial = None  # type: Optional[Serial]
         self._serial_port = serial_port
+        self._address = serial_port
 
         self._timeout = 3
 

resources/qml/PrinterOutput/OutputDeviceHeader.qml

@@ -44,7 +44,7 @@ Item
 
         Label
         {
-            text: outputDevice != null ? outputDevice.connectionText : catalog.i18nc("@info:status", "The printer is not connected.")
+            text: outputDevice != null ? "" : catalog.i18nc("@info:status", "The printer is not connected.")
             color: outputDevice != null && outputDevice.acceptsCommands ? UM.Theme.getColor("setting_control_text") : UM.Theme.getColor("setting_control_disabled_text")
             font: UM.Theme.getFont("very_small")
             wrapMode: Text.WordWrap