move mounted info to the VDOM

packages/core/src/scope_arena.rs

@@ -16,13 +16,13 @@ impl VirtualDom {
         let entry = self.scopes.vacant_entry();
         let id = ScopeId(entry.key());
 
-        let scope = entry.insert(Box::new(ScopeState {
+        let scope = entry.insert(ScopeState {
             runtime: self.runtime.clone(),
             context_id: id,
 
             props,
             last_rendered_node: Default::default(),
-        }));
+        });
 
         let context =
             ScopeContext::new(name, id, parent_id, height, self.runtime.scheduler.clone());