Fix mounted event after initial hydration (#3480)

* trigger queued mounted events immediately after hydrating

* add a playwright test to prevent regressions

Cargo.lock

@@ -4026,6 +4026,15 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "dioxus-playwright-fullstack-mounted-test"
+version = "0.1.0"
+dependencies = [
+ "dioxus",
+ "serde",
+ "tokio",
+]
+
 [[package]]
 name = "dioxus-playwright-fullstack-test"
 version = "0.1.0"