fix appearance broken by reflex-dev#3812 (reflex-dev#4403)

* fix appearance broken by reflex-dev#3812

* fix again to pass tests

reflex/app.py

@@ -850,8 +850,6 @@ def get_compilation_time() -> str:
         if self.theme is not None:
             # If a theme component was provided, wrap the app with it
             app_wrappers[(20, "Theme")] = self.theme
-            # Fix #2992 by removing the top-level appearance prop
-            self.theme.appearance = None
 
         for route in self.unevaluated_pages:
             console.debug(f"Evaluating page: {route}")
@@ -1007,6 +1005,9 @@ def _submit_work(fn, *args, **kwargs):
         compile_results.append(
             compiler.compile_contexts(self.state, self.theme),
         )
+        if self.theme is not None:
+            # Fix #2992 by removing the top-level appearance prop
+            self.theme.appearance = None
         progress.advance(task)
 
         # Compile the app root.