Add pause dialog from inside ProgressBar

How can I open a dialog from within another app, e.g. a progress bar?
I would like to achieve something like the below, but currently the parent app continues rendering.

#!/usr/bin/env python
import time

from prompt_toolkit import HTML
from prompt_toolkit.key_binding import KeyBindings
from prompt_toolkit.shortcuts import ProgressBar, yes_no_dialog

def main():
    bottom_toolbar = HTML(
        ' Press <b>[p]</b> to pause'
    )
    kb = KeyBindings()
    paused = [False]

    @kb.add("p")
    def _(event):
        paused[0] = True

    with ProgressBar(key_bindings=kb, bottom_toolbar=bottom_toolbar) as pb:
        for _ in pb(range(800)):
            if paused[0]:
                result = yes_no_dialog(
                    title="Paused.", text="Do you want to continue?"
                ).run()
                if result:
                    paused[0] = False
                else:
                    break
            time.sleep(0.1)

if __name__ == "__main__":
    main()

Start with the ProgressBar, yes_no_dialog, and KeyBindings entry points shown in the issue, and reproduce the example to observe the rendering behavior. The work is complete when a dialog can be opened from within an active ProgressBar without the parent app continuing to render underneath it, while the pause and resume flow remains usable.