Adds confirmation when going up from the edit monster screen to save, cancel, or discard changes.

app/src/main/java/com/majinnaibu/monstercards/MainActivity.java

@@ -1,10 +1,11 @@
 package com.majinnaibu.monstercards;
 
 import android.os.Bundle;
+import android.view.MenuItem;
 
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.navigation.NavController;
-import androidx.navigation.Navigation;
 import androidx.navigation.fragment.NavHostFragment;
 import androidx.navigation.ui.AppBarConfiguration;
 import androidx.navigation.ui.NavigationUI;
@@ -12,13 +13,19 @@ import androidx.navigation.ui.NavigationUI;
 import com.google.android.material.bottomnavigation.BottomNavigationView;
 import com.majinnaibu.monstercards.init.AppCenterInitializer;
 import com.majinnaibu.monstercards.init.FlipperInitializer;
+import com.majinnaibu.monstercards.utils.Logger;
 
 public class MainActivity extends AppCompatActivity {
 
     @Override
-    public boolean onSupportNavigateUp() {
-        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
-        return navController.navigateUp() || super.onSupportNavigateUp();
+    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
+        if (item.getItemId() == android.R.id.home) {
+            Logger.logDebug("Home selected (in MainActivity)");
+            getOnBackPressedDispatcher().onBackPressed();
+            return true;
+        }
+
+        return super.onOptionsItemSelected(item);
     }
 
     @SuppressWarnings("ConstantConditions")
@@ -44,5 +51,4 @@ public class MainActivity extends AppCompatActivity {
         NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration);
         NavigationUI.setupWithNavController(navView, navController);
     }
-
 }