As seen: https://github.com/ppy/osu/pull/17252/checks?check_run_id=5545717506
The `PlaylistsResultsScreen` takes a lease on the `Beatmap` bindable
when entered. During `SetUp`, the `Beatmap` bindable is reassigned but
fails in cases where an existing test instance of the screen hasn't been
exited yet. This fix moves the assignment into the `SetUpSteps` function
after `base.SetUpSteps` is called which will exit the existing screens
first.
Adds components `ChannelListing` and `ChannelListing` item with visual
test. Essentially a more simplified version of the existing
`ChannelSelectionOverlay` component.
Correctly implements `IFilterable` behaviour to filter child channel
items. Channel joined state is based on the underlying `Joined` bindable
of the `Channel` class.
Channel join/leave events are exposed via `OnRequestJoin` and
`OnRequestLeave` events which should be handled by parent component.
Requires a cached `OverlayColourScheme` instance to be provided by the
parent overlay component when added.