Fix double clicking anchor to convert between smooth and sharp (#2023)

* Buffer after undo

* Quick thumbnail fix while I'm thinking about it

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

editor/src/messages/portfolio/document/document_message_handler.rs

@@ -1551,6 +1551,7 @@ impl DocumentMessageHandler {
 		responses.add(NodeGraphMessage::ForceRunDocumentGraph);
 		// TODO: Remove once the footprint is used to load the imports/export distances from the edge
 		responses.add(NodeGraphMessage::SetGridAlignedEdges);
+		responses.add(Message::StartBuffer);
 		Some(previous_network)
 	}
 	pub fn redo_with_history(&mut self, ipp: &InputPreprocessorMessageHandler, responses: &mut VecDeque<Message>) {

editor/src/messages/portfolio/document/utility_types/network_interface.rs

@@ -2822,6 +2822,7 @@ impl NodeNetworkInterface {
 			}
 			return Some(modified);
 		}
+
 		self.document_metadata
 			.click_targets
 			.get(&layer)