One of my pending work items for post-realm merge.
The lowest-level import task is no longer asynchronous, as we don't want
it to span multiple threads to allow easier interaction with realm.
Removing the `Task` spec simplifies a heap of usages.
Individual usages should decide whether they want to run the import
asynchronously, by either using an alternative override or spooling up a
thread themselves.
Intentionally not using `[Values]` as the scale modes can be applied to
the running game instance directly, rather than recreating it all over
again.
The same could be said for the notification overlay but not sure, seems
like something that should be considered at an `OsuGameTestScene` level
instead (whether the same game instance can be reused for further
testing).