Make tests less noisy (#12463)

When running the tests for linux, I found a lot of benign errors getting
logged. This PR cuts down some of the noise from unnecessary workspace
serialization and SVG renders

Release Notes:

- N/A

crates/extensions_ui/src/extensions_ui.rs

@@ -992,7 +992,7 @@ impl Item for ExtensionsPage {
 
     fn clone_on_split(
         &self,
-        _workspace_id: WorkspaceId,
+        _workspace_id: Option<WorkspaceId>,
         _: &mut ViewContext<Self>,
     ) -> Option<View<Self>> {
         None