Bug: add_to_menu=False in CustomView results in the view to be in the menu

[dfioravanti]

Describe the bug
If I set add_to_menu=False in a CustomView the view is added to the menu.

To Reproduce

The minimum working version that shows the bug is

from fastapi import FastAPI
from starlette.requests import Request
from starlette.responses import Response
from starlette.templating import Jinja2Templates
from starlette_admin import CustomView

from sqlalchemy import create_engine
from starlette_admin.contrib.sqla import Admin


engine = create_engine("sqlite:///test.db", connect_args={"check_same_thread": False})

app = FastAPI()

admin = Admin(engine)


class HomeView(CustomView):
    async def render(self, request: Request, templates: Jinja2Templates) -> Response:
        return templates.TemplateResponse(
            "home.html",
        )


admin.add_view(
    HomeView(
        label="This should not be visible",
        icon="fa fa-home",
        path="/home",
        add_to_menu=False,
    ),
)

admin.mount_to(app)

Then if I run the app and go on <host>/admin I see

Environment (please complete the following information):

• Starlette-Admin version: 0.9
• ORM/ODMs: SQLAlchemy

Additional context

This happens even if the view is added to a DropDown. Not sure if it helps but maybe