Add notion of whether printers support the material export archive

Contributes to issue CURA-8055.

cura/Settings/GlobalStack.py

@@ -86,6 +86,14 @@ class GlobalStack(CuraContainerStack):
     def supportsNetworkConnection(self):
         return self.getMetaDataEntry("supports_network_connection", False)
 
+    @pyqtProperty(bool, constant = True)
+    def supportsMaterialExport(self):
+        """
+        Whether the printer supports Cura's export format of material profiles.
+        :return: ``True`` if it supports it, or ``False`` if not.
+        """
+        return self.getMetaDataEntry("supports_material_export", False)
+
     @classmethod
     def getLoadingPriority(cls) -> int:
         return 2

resources/definitions/ultimaker2_plus_connect.def.json

@@ -22,7 +22,8 @@
             "0": "ultimaker2_plus_connect_extruder_0"
         },
         "supports_usb_connection": false,
-        "supports_network_connection": true
+        "supports_network_connection": true,
+        "supports_material_export": true
     },
 
     "overrides": {

resources/definitions/ultimaker_s3.def.json

@@ -27,6 +27,7 @@
         "first_start_actions": [ "DiscoverUM3Action" ],
         "supported_actions": [ "DiscoverUM3Action" ],
         "supports_usb_connection": false,
+        "supports_material_export": true,
         "weight": -1,
         "firmware_update_info": {
             "id": 213482,

resources/definitions/ultimaker_s5.def.json

@@ -28,6 +28,7 @@
         "supported_actions": [ "DiscoverUM3Action" ],
         "supports_usb_connection": false,
         "supports_network_connection": true,
+        "supports_material_export": true,
         "weight": -2,
         "firmware_update_info": {
             "id": 9051,