Fixed more php 8.1 errors (#6754)

* Update default_setting_edit.php

* Update default_settings_reload.php

* Update modules.php

* Update access_controls_reload.php

* Update call_recordings.php

* Update fax.php

* Update extension_edit.php

* Update extension_imports.php

* Update destination_imports.php

* Update dialplan_outbound_add.php

* Update dialplan_inbound_add.php

* Update voicemail_imports.php

* Update contact_import.php

core/default_settings/default_setting_edit.php

@@ -241,7 +241,7 @@
 
 //pre-populate the form
 	if (count($_GET) > 0 && empty($_POST["persistformvar"])) {
-		$default_setting_uuid = $_GET["id"];
+		$default_setting_uuid = $_GET["id"] ?? '';
 		$sql = "select default_setting_uuid, default_setting_category, default_setting_subcategory, default_setting_name, default_setting_value, default_setting_order, cast(default_setting_enabled as text), default_setting_description ";
 		$sql .= "from v_default_settings ";
 		$sql .= "where default_setting_uuid = :default_setting_uuid ";

core/default_settings/default_settings_reload.php

@@ -46,7 +46,7 @@ $language = new text;
 $text = $language->get();
 
 //set the variables
-$search = $_REQUEST['search'] ?? null;
+$search = $_REQUEST['search'] ?? '';
 $domain_uuid = $_GET['id'] ?? null;
 
 //reload default settings