Explicitly finish when clicking the back arrow (default behavior re-instantiates MainActivity)

app/src/main/java/com/frostnerd/smokescreen/activity/SettingsActivity.kt

@@ -3,6 +3,7 @@ package com.frostnerd.smokescreen.activity
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import android.view.MenuItem
 import com.frostnerd.lifecyclemanagement.BaseActivity
 import com.frostnerd.smokescreen.fragment.SettingsFragment
 import com.frostnerd.smokescreen.getPreferences
@@ -51,6 +52,13 @@ class SettingsActivity : BaseActivity() {
         }).commit()
     }
 
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return if(item.itemId == android.R.id.home) {
+            finish()
+            true
+        } else super.onOptionsItemSelected(item)
+    }
+
     enum class Category {
         GENERAL, NOTIFICATION, PIN, CACHE, LOGGING, IP, NETWORK, QUERIES
     }