Move ConfigurationChangeModel to plugin

Contributes to CL-897

plugins/UM3NetworkPrinting/src/ConfigurationChangeModel.py

@@ -0,0 +1,31 @@
+# Copyright (c) 2018 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from PyQt5.QtCore import pyqtSignal, pyqtProperty, QObject, pyqtSlot
+
+class ConfigurationChangeModel(QObject):
+    def __init__(self, type_of_change: str, index: int, target_name: str, origin_name: str) -> None:
+        super().__init__()
+        self._type_of_change = type_of_change
+                                    # enum = ["material", "print_core_change"]
+        self._index = index
+        self._target_name = target_name
+        self._origin_name = origin_name
+
+    @pyqtProperty(int, constant = True)
+    def index(self) -> int:
+        return self._index
+    # "target_id": fields.String(required=True, description="Target material guid or hotend id"),
+    # "origin_id": fields.String(required=True, description="Original/current material guid or hotend id"),
+
+    @pyqtProperty(str, constant = True)
+    def typeOfChange(self) -> str:
+        return self._type_of_change
+
+    @pyqtProperty(str, constant = True)
+    def targetName(self) -> str:
+        return self._target_name
+
+    @pyqtProperty(str, constant = True)
+    def originName(self) -> str:
+        return self._origin_name