Created Print job upload Queue Full Message

This message is shown to the user in Cura when the digital
factory returns a 409, because the queue is full

CURA-7760 sending multiple printjobs notifications

plugins/UM3NetworkPrinting/src/Messages/PrintJobUploadQueueFullMessage.py

@@ -0,0 +1,19 @@
+# Copyright (c) 2020 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from UM import i18nCatalog
+from UM.Message import Message
+
+
+I18N_CATALOG = i18nCatalog("cura")
+
+
+class PrintJobUploadQueueFullMessage(Message):
+    """Message shown when uploading a print job to a cluster and the print queue is full."""
+
+    def __init__(self) -> None:
+        super().__init__(
+            text = I18N_CATALOG.i18nc("@info:status", "Print job queue is full. The printer can't accept a new job."),
+            title = I18N_CATALOG.i18nc("@info:title", "Queue Full"),
+            lifetime = 10
+        )