NoSuchElement after external remove in background

[kirillt]

When returning from Retouch:

java.util.NoSuchElementException
	at space.taran.arklib.domain.meta.RootMetadataProcessor.retrieve-IoAF18A(RootMetadataProcessor.kt:41)
	at space.taran.arknavigator.mvp.presenter.GalleryPresenter.fillGalleryItems(GalleryPresenter.kt:462)
	at space.taran.arknavigator.domain.HandleGalleryExternalChangesUseCase$invoke$1$1.invokeSuspend(HandleGalleryExternalChangesUseCase.kt:29)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at android.os.Handler.handleCallback(Handler.java:938)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:201)
	at android.os.Looper.loop(Looper.java:288)
	at android.app.ActivityThread.main(ActivityThread.java:7870)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
	Suppressed: kotlinx.coroutines.DiagnosticCoroutineContextException: [StandaloneCoroutine{Cancelling}@cee7c9b, Dispatchers.Main]