Material icon is shown instead of Cupertino icon if its name is the same

[InesaFitsner]

Description

ft.cupertino_icons.PERSON_2 has the same string value as ft.icons.PERSON_2. Flet always shows one person icon (ft.icons.PERSON_2).

Code example to reproduce the issue:

    cupertino_icons = [
        ft.cupertino_icons.PERSON,
        ft.cupertino_icons.PERSON_2,
        ft.cupertino_icons.PERSON_2_ALT,
        ft.cupertino_icons.PERSON_3,
        ft.cupertino_icons.PERSON_3_FILL,
    ]
    icons = [
        ft.icons.PERSON,
        ft.icons.PERSON_2,
        ft.icons.PERSON_2_OUTLINED,
        ft.icons.PERSON_3,
        ft.icons.PERSON_4,
        ft.icons.PERSON_4_OUTLINED,
    ]

    page.add(ft.Text("Cupertino Icons"))
    for icon in cupertino_icons:
        page.add(ft.TextButton(icon=icon, text=icon))

    page.add(ft.Text("Material Icons"))
    for icon in icons:
        page.add(ft.TextButton(icon=icon, text=icon))