Fix invert tapping dropdown not updating checked state in reader

Fixes #8566
Should ideally just Compose-ify it all some day.

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

@@ -7,6 +7,7 @@ import androidx.core.view.isVisible
 import androidx.core.widget.NestedScrollView
 import androidx.lifecycle.lifecycleScope
 import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.data.preference.PreferenceValues
 import eu.kanade.tachiyomi.databinding.ReaderReadingModeSettingsBinding
 import eu.kanade.tachiyomi.ui.reader.ReaderActivity
 import eu.kanade.tachiyomi.ui.reader.viewer.pager.PagerViewer
@@ -68,7 +69,7 @@ class ReaderReadingModeSettings @JvmOverloads constructor(context: Context, attr
         binding.webtoonPrefsGroup.root.isVisible = false
         binding.pagerPrefsGroup.root.isVisible = true
 
-        binding.pagerPrefsGroup.tappingInverted.bindToPreference(readerPreferences.pagerNavInverted())
+        binding.pagerPrefsGroup.tappingInverted.bindToPreference(readerPreferences.pagerNavInverted(), PreferenceValues.TappingInvertMode::class.java)
         binding.pagerPrefsGroup.navigatePan.bindToPreference(readerPreferences.navigateToPan())
 
         binding.pagerPrefsGroup.pagerNav.bindToPreference(readerPreferences.navigationModePager())
@@ -104,7 +105,7 @@ class ReaderReadingModeSettings @JvmOverloads constructor(context: Context, attr
         binding.pagerPrefsGroup.root.isVisible = false
         binding.webtoonPrefsGroup.root.isVisible = true
 
-        binding.webtoonPrefsGroup.tappingInverted.bindToPreference(readerPreferences.webtoonNavInverted())
+        binding.webtoonPrefsGroup.tappingInverted.bindToPreference(readerPreferences.webtoonNavInverted(), PreferenceValues.TappingInvertMode::class.java)
 
         binding.webtoonPrefsGroup.webtoonNav.bindToPreference(readerPreferences.navigationModeWebtoon())
         readerPreferences.navigationModeWebtoon()

app/src/main/java/eu/kanade/tachiyomi/widget/MaterialSpinnerView.kt

@@ -89,14 +89,14 @@ class MaterialSpinnerView @JvmOverloads constructor(context: Context, attrs: Att
         }
     }
 
-    inline fun <reified T : Enum<T>> bindToPreference(pref: Preference<T>) {
-        val enumConstants = T::class.java.enumConstants
+    fun <T : Enum<T>> bindToPreference(pref: Preference<T>, clazz: Class<T>) {
+        val enumConstants = clazz.enumConstants
         enumConstants?.indexOf(pref.get())?.let { setSelection(it) }
 
-        val popup = makeSettingsPopup(pref)
-        setOnTouchListener(popup.dragToOpenListener)
+        popup = makeSettingsPopup(pref, clazz)
+        setOnTouchListener(popup?.dragToOpenListener)
         setOnClickListener {
-            popup.show()
+            popup?.show()
         }
     }
 
@@ -111,11 +111,11 @@ class MaterialSpinnerView @JvmOverloads constructor(context: Context, attrs: Att
         }
     }
 
-    inline fun <reified T : Enum<T>> makeSettingsPopup(preference: Preference<T>): PopupMenu {
+    private fun <T : Enum<T>> makeSettingsPopup(preference: Preference<T>, clazz: Class<T>): PopupMenu {
         return createPopupMenu { pos ->
             onItemSelectedListener?.invoke(pos)
 
-            val enumConstants = T::class.java.enumConstants
+            val enumConstants = clazz.enumConstants
             enumConstants?.get(pos)?.let { enumValue -> preference.set(enumValue) }
         }
     }