ui.show_notification(duration=None) isn't respected

[jcheng5]

This is supposed to show "hello" without auto-dismissing. However, it auto-dismisses in 5 seconds. (No repro in Shiny for R)

from shiny import App, render, ui

app_ui = ui.page_fluid()

def server(input, output, session):
    ui.notification_show("hello", duration=None)

app = App(app_ui, server)

[gadenbuie]

Since I also just ran into this, here's a shinylive example.

[cpsievert]

Fixed via #1577