fix: restore temporarilyShowHidden flag on startup (#169)

app/src/main/kotlin/org/fossify/filemanager/activities/MainActivity.kt

@@ -120,6 +120,7 @@ class MainActivity : SimpleActivity() {
         updateMaterialActivityViews(binding.mainCoordinator, null, useTransparentNavigation = false, useTopSearchMenu = true)
 
         if (savedInstanceState == null) {
+            config.temporarilyShowHidden = false
             initFragments()
             tryInitFileManager()
             checkWhatsNewDialog()
@@ -167,11 +168,6 @@ class MainActivity : SimpleActivity() {
         config.lastUsedViewPagerPage = binding.mainViewPager.currentItem
     }
 
-    override fun onDestroy() {
-        super.onDestroy()
-        config.temporarilyShowHidden = false
-    }
-
     override fun onBackPressed() {
         val currentFragment = getCurrentFragment()
         if (binding.mainMenu.isSearchOpen) {