Support reverse alphabetic order in history and favorties

app/src/main/kotlin/org/koitharu/kotatsu/favourites/data/FavouritesDao.kt

@@ -175,6 +175,7 @@ abstract class FavouritesDao {
 		ListSortOrder.RATING -> "manga.rating DESC"
 		ListSortOrder.NEWEST -> "favourites.created_at DESC"
 		ListSortOrder.ALPHABETIC -> "manga.title ASC"
+		ListSortOrder.ALPHABETIC_REVERSE -> "manga.title DESC"
 		ListSortOrder.NEW_CHAPTERS -> "IFNULL((SELECT chapters_new FROM tracks WHERE tracks.manga_id = manga.manga_id), 0) DESC"
 		ListSortOrder.UPDATED, // for legacy support
 		ListSortOrder.PROGRESS -> "IFNULL((SELECT percent FROM history WHERE history.manga_id = manga.manga_id), 0) DESC"

app/src/main/kotlin/org/koitharu/kotatsu/history/data/HistoryDao.kt

@@ -39,6 +39,7 @@ abstract class HistoryDao {
 			ListSortOrder.NEWEST -> "history.created_at DESC"
 			ListSortOrder.PROGRESS -> "history.percent DESC"
 			ListSortOrder.ALPHABETIC -> "manga.title"
+			ListSortOrder.ALPHABETIC_REVERSE -> "manga.title DESC"
 			ListSortOrder.NEW_CHAPTERS -> "IFNULL((SELECT chapters_new FROM tracks WHERE tracks.manga_id = manga.manga_id), 0) DESC"
 			else -> throw IllegalArgumentException("Sort order $order is not supported")
 		}

app/src/main/kotlin/org/koitharu/kotatsu/history/ui/HistoryListViewModel.kt

@@ -184,6 +184,7 @@ class HistoryListViewModel @Inject constructor(
 		)
 
 		ListSortOrder.ALPHABETIC,
+		ListSortOrder.ALPHABETIC_REVERSE,
 		ListSortOrder.RELEVANCE,
 		ListSortOrder.NEW_CHAPTERS,
 		ListSortOrder.RATING -> null

app/src/main/kotlin/org/koitharu/kotatsu/list/domain/ListSortOrder.kt

@@ -13,6 +13,7 @@ enum class ListSortOrder(
 	NEWEST(R.string.order_added),
 	PROGRESS(R.string.progress),
 	ALPHABETIC(R.string.by_name),
+	ALPHABETIC_REVERSE(R.string.by_name_reverse),
 	RATING(R.string.by_rating),
 	RELEVANCE(R.string.by_relevance),
 	NEW_CHAPTERS(R.string.new_chapters),
@@ -22,8 +23,8 @@ enum class ListSortOrder(
 
 	companion object {
 
-		val HISTORY: Set<ListSortOrder> = EnumSet.of(UPDATED, NEWEST, PROGRESS, ALPHABETIC, NEW_CHAPTERS)
-		val FAVORITES: Set<ListSortOrder> = EnumSet.of(ALPHABETIC, NEWEST, RATING, NEW_CHAPTERS, PROGRESS)
+		val HISTORY: Set<ListSortOrder> = EnumSet.of(UPDATED, NEWEST, PROGRESS, ALPHABETIC, ALPHABETIC_REVERSE, NEW_CHAPTERS)
+		val FAVORITES: Set<ListSortOrder> = EnumSet.of(ALPHABETIC, ALPHABETIC_REVERSE, NEWEST, RATING, NEW_CHAPTERS, PROGRESS)
 		val SUGGESTIONS: Set<ListSortOrder> = EnumSet.of(RELEVANCE)
 
 		operator fun invoke(value: String, fallback: ListSortOrder) = entries.find(value) ?: fallback