Fix sheet pager setting visibility when default is webtoon

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderSettingsSheet.kt

@@ -73,7 +73,9 @@ class ReaderSettingsSheet(private val activity: ReaderActivity) : BottomSheetDia
         viewer.onItemSelectedListener = IgnoreFirstSpinnerListener { position ->
             activity.presenter.setMangaViewer(position)
 
-            if (viewer.adapter.getItem(position) == context.getString(R.string.webtoon_viewer)) {
+            val item = viewer.adapter.getItem(position)
+            if (item == context.getString(R.string.webtoon_viewer) ||
+                    (item == context.getString(R.string.default_viewer) && preferences.defaultViewer() == ReaderActivity.WEBTOON)) {
                 initWebtoonPreferences()
             } else {
                 initPagerPreferences()