Open entry when long pressing during migration in source search

This matches the behavior from 0.13.6

Fixes #8176

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

@@ -95,7 +95,7 @@ data class SourceSearchScreen(
                 onHelpClick = { uriHandler.openUri(Constants.URL_HELP) },
                 onLocalSourceHelpClick = { uriHandler.openUri(LocalSource.HELP_URL) },
                 onMangaClick = openMigrateDialog,
-                onMangaLongClick = openMigrateDialog,
+                onMangaLongClick = { navigator.push(MangaScreen(it.id, true)) },
             )
         }