Add experimental warning and error message types to two messages

These are for our testers to be able to test the new message types. Later they will be added to all messages that need them.

Contributes to issue CURA-7278.

cura/Arranging/ArrangeObjectsJob.py

@@ -39,6 +39,7 @@ class ArrangeObjectsJob(Job):
             no_full_solution_message = Message(
                     i18n_catalog.i18nc("@info:status",
                                        "Unable to find a location within the build volume for all objects"),
-                    title = i18n_catalog.i18nc("@info:title", "Can't Find Location"))
+                    title = i18n_catalog.i18nc("@info:title", "Can't Find Location"),
+                    message_type = Message.MessageType.ERROR)
             no_full_solution_message.show()
         self.finished.emit(self)

cura/BuildVolume.py

@@ -95,9 +95,11 @@ class BuildVolume(SceneNode):
         self._edge_disallowed_size = None
 
         self._build_volume_message = Message(catalog.i18nc("@info:status",
-            "The build volume height has been reduced due to the value of the"
-            " \"Print Sequence\" setting to prevent the gantry from colliding"
-            " with printed models."), title = catalog.i18nc("@info:title", "Build Volume"))
+                "The build volume height has been reduced due to the value of the"
+                " \"Print Sequence\" setting to prevent the gantry from colliding"
+                " with printed models."),
+            title = catalog.i18nc("@info:title", "Build Volume"),
+            message_type = Message.MessageType.WARNING)
 
         self._global_container_stack = None  # type: Optional[GlobalStack]