Fix AwaitComplete runtime error

[svartkanin]

Sometimes after exiting the menu there would be runtime exception

Task exception was never retrieved
future: <Task finished name='None' coro=<Worker._run() done, defined at archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/textual/worker.py:358> exception=AttributeError("'AwaitComplete' object has no attribute '_pre_await'")>
Traceback (most recent call last):
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/textual/worker.py", line 370, in _run
    self._result = await self.run()
                   ^^^^^^^^^^^^^^^^
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/textual/worker.py", line 354, in run
    return await (
           ^^^^^^^
        self._run_threaded() if self._thread_worker else self._run_async()
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/textual/worker.py", line 326, in _run_threaded
    return await loop.run_in_executor(None, runner, self._work)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".local/share/uv/python/cpython-3.13.11-linux-x86_64-gnu/lib/python3.13/concurrent/futures/thread.py", line 59, in run
    result = self.fn(*self.args, **self.kwargs)
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/textual/worker.py", line 309, in run_callable
    return work()
  File "archinstall/tui-filter-confirm/archinstall/tui/ui/components.py", line 116, in _exec_callback
    _ = self.dismiss(Result(ResultType.Selection, _data=result))
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/textual/screen.py", line 1911, in dismiss
    await_pop = self.app.pop_screen()
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/textual/app.py", line 3071, in pop_screen
    return AwaitComplete(do_pop()).call_next(self)
           ~~~~~~~~~~~~~^^^^^^^^^^
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/textual/await_complete.py", line 29, in __init__
    self._future: Future[Any] = gather(*awaitables)
                                ~~~~~~^^^^^^^^^^^^^
  File ".local/share/uv/python/cpython-3.13.11-linux-x86_64-gnu/lib/python3.13/asyncio/tasks.py", line 884, in gather
    fut = ensure_future(arg, loop=loop)
  File ".local/share/uv/python/cpython-3.13.11-linux-x86_64-gnu/lib/python3.13/asyncio/tasks.py", line 746, in ensure_future
    loop = events.get_event_loop()
  File ".local/share/uv/python/cpython-3.13.11-linux-x86_64-gnu/lib/python3.13/asyncio/events.py", line 716, in get_event_loop
    raise RuntimeError('There is no current event loop in thread %r.'
                       % threading.current_thread().name)
RuntimeError: There is no current event loop in thread 'asyncio_0'.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/textual/worker.py", line 384, in _run
    app._handle_exception(worker_failed)
    ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/textual/app.py", line 3233, in _handle_exception
    self._fatal_error()
    ~~~~~~~~~~~~~~~~~^^
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/textual/app.py", line 3240, in _fatal_error
    traceback = Traceback(
        show_locals=True, width=None, locals_max_length=5, suppress=[rich]
    )
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/rich/traceback.py", line 321, in __init__
    trace = self.extract(
        exc_type, exc_value, traceback, show_locals=show_locals
    )
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/rich/traceback.py", line 581, in extract
    key: pretty.traverse(
         ~~~~~~~~~~~~~~~^
        value,
        ^^^^^^
    ...<2 lines>...
        max_depth=locals_max_depth,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/rich/pretty.py", line 874, in traverse
    node = _traverse(_object, root=True)
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/rich/pretty.py", line 667, in _traverse
    args = list(iter_rich_args(rich_repr_result))
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/rich/pretty.py", line 634, in iter_rich_args
    for arg in rich_args:
               ^^^^^^^^^
  File "archinstall/tui-filter-confirm/.venv/lib/python3.13/site-packages/textual/await_complete.py", line 35, in __rich_repr__
    yield "pre_await", self._pre_await, None
                       ^^^^^^^^^^^^^^^
AttributeError: 'AwaitComplete' object has no attribute '_pre_await'
<sys>:0: RuntimeWarning: coroutine 'App.pop_screen.<locals>.do_pop' was never awaited
RuntimeWarning: Enable tracemalloc to get the object allocation traceback

I think this should fix it https://textual.textualize.io/api/app/#textual.app.App.call_from_thread