Extension function instead of redefining uiScope everywhere

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryController.kt

@@ -35,12 +35,12 @@ import eu.kanade.tachiyomi.ui.base.controller.TabbedController
 import eu.kanade.tachiyomi.ui.base.controller.withFadeTransaction
 import eu.kanade.tachiyomi.ui.main.MainActivity
 import eu.kanade.tachiyomi.ui.manga.MangaController
+import eu.kanade.tachiyomi.util.lang.launchInUI
 import eu.kanade.tachiyomi.util.system.getResourceColor
 import eu.kanade.tachiyomi.util.system.toast
 import java.io.IOException
 import kotlinx.android.synthetic.main.main_activity.tabs
 import kotlinx.coroutines.flow.filter
-import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
 import reactivecircus.flowbinding.appcompat.queryTextChanges
 import rx.Subscription
@@ -343,7 +343,7 @@ class LibraryController(
                 query = it.toString()
                 searchRelay.call(query)
             }
-            .launchIn(uiScope)
+            .launchInUI()
 
         searchItem.fixExpand(onExpand = { invalidateMenuOnExpand() })
     }