Avoid using global scope where appropriate

Also fixes the crash in tracking when an exception is thrown during a refresh.

app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/search/SearchPresenter.kt

@@ -55,13 +55,13 @@ class SearchPresenter(
 
         replacingMangaRelay.call(true)
 
-        launchIO {
+        presenterScope.launchIO {
             val chapters = source.getChapterList(manga.toMangaInfo())
                 .map { it.toSChapter() }
 
             migrateMangaInternal(source, chapters, prevManga, manga, replace)
         }.invokeOnCompletion {
-            launchUI { replacingMangaRelay.call(false) }
+            presenterScope.launchUI { replacingMangaRelay.call(false) }
         }
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/browse/BrowseSourcePresenter.kt

@@ -31,7 +31,7 @@ import eu.kanade.tachiyomi.ui.browse.source.filter.TriStateItem
 import eu.kanade.tachiyomi.ui.browse.source.filter.TriStateSectionItem
 import eu.kanade.tachiyomi.util.chapter.ChapterSettingsHelper
 import eu.kanade.tachiyomi.util.lang.launchIO
-import eu.kanade.tachiyomi.util.lang.launchUI
+import eu.kanade.tachiyomi.util.lang.withUIContext
 import eu.kanade.tachiyomi.util.removeCovers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.asFlow
@@ -213,12 +213,12 @@ open class BrowseSourcePresenter(
      * @param mangas the list of manga to initialize.
      */
     fun initializeMangas(mangas: List<Manga>) {
-        launchIO {
+        presenterScope.launchIO {
             mangas.asFlow()
                 .filter { it.thumbnail_url == null && !it.initialized }
                 .map { getMangaDetails(it) }
                 .onEach {
-                    launchUI {
+                    withUIContext {
                         @Suppress("DEPRECATION")
                         view?.onMangaInitialized(it)
                     }