Add reload functionality

class PersonsTable(DataTable):

    def on_mount(self) -> None:

        self.add_columns("Name", "CL-Account", "Kontostand", "Karten-IDs")

        self.add_all_persons()

    def add_all_persons(self) -> None:

        self.add_rows(to_row(p) for p in Person.get_all())

    def on_data_table_header_selected(self, event: DataTable.HeaderSelected) -> None:

    BINDINGS = [

        ("n", "add_person", "Neue Person hinzufügen"),

        ("d", "toggle_dark", "Dark Mode umschalten"),

        ("f5", "reload", "Neu laden"),

    ]

    def compose(self) -> ComposeResult:

        self.title = "PoolPay"

        self.sub_title = "Administration"

    def action_reload(self) -> None:

        table = self.query_one(PersonsTable)

        table.clear()

        table.add_all_persons()

    def action_add_person(self) -> None:

        def add_person(person_details: tuple[str, str, str]) -> None:

            name, cl_account_name, card_id_formatted = person_details