ContactListSettings, PreferenceEditor and ThemeSettings are derived from...

ContactListSettings, PreferenceEditor and ThemeSettings are derived from custom ManagedActivity, like all other activities in application.

app/src/main/java/com/xabber/android/ui/preferences/ContactListSettings.java

 package com.xabber.android.ui.preferences;
 
-import android.app.Activity;
 import android.os.Bundle;
 
+import com.xabber.android.ui.helper.ManagedActivity;
 import com.xabber.androiddev.R;
 
-public class ContactListSettings extends Activity {
+public class ContactListSettings extends ManagedActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         super.onCreate(savedInstanceState);
         if (isFinishing())
             return;

app/src/main/java/com/xabber/android/ui/preferences/PreferenceEditor.java

@@ -14,7 +14,6 @@
  */
 package com.xabber.android.ui.preferences;
 
-import android.app.Activity;
 import android.app.Dialog;
 import android.app.ProgressDialog;
 import android.content.Context;
@@ -28,13 +27,13 @@ import com.xabber.android.data.account.AccountManager;
 import com.xabber.android.data.account.StatusMode;
 import com.xabber.android.data.connection.CertificateManager;
 import com.xabber.android.data.connection.ConnectionManager;
-import com.xabber.android.data.roster.GroupManager;
 import com.xabber.android.ui.dialog.ConfirmDialogBuilder;
 import com.xabber.android.ui.dialog.ConfirmDialogListener;
 import com.xabber.android.ui.dialog.DialogBuilder;
+import com.xabber.android.ui.helper.ManagedActivity;
 import com.xabber.androiddev.R;
 
-public class PreferenceEditor extends Activity
+public class PreferenceEditor extends ManagedActivity
         implements PreferencesFragment.OnPreferencesFragmentInteractionListener,
         Preference.OnPreferenceClickListener, ConfirmDialogListener {
 

app/src/main/java/com/xabber/android/ui/preferences/ThemeSettings.java

 package com.xabber.android.ui.preferences;
 
-import android.app.Activity;
 import android.os.Bundle;
 
 import com.xabber.android.data.ActivityManager;
 import com.xabber.android.ui.ContactList;
+import com.xabber.android.ui.helper.ManagedActivity;
 import com.xabber.androiddev.R;
 
-public class ThemeSettings extends Activity
+public class ThemeSettings extends ManagedActivity
         implements ThemeSettingsFragment.OnThemeSettingsFragmentInteractionListener {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        super.onCreate(savedInstanceState);
         if (isFinishing())
             return;