If the custom payment method name is empty, use the default UPE title (#2291)

Author: diegocurbelo

includes/payment-methods/class-wc-stripe-upe-payment-gateway.php

@@ -121,7 +121,7 @@ public function __construct() {
 		$this->maybe_init_pre_orders();
 
 		$main_settings              = get_option( 'woocommerce_stripe_settings' );
-		$this->title                = $this->get_option( 'title_upe' );
+		$this->title                = ! empty( $this->get_option( 'title_upe' ) ) ? $this->get_option( 'title_upe' ) : $this->form_fields['title_upe']['default'];
 		$this->description          = '';
 		$this->enabled              = $this->get_option( 'enabled' );
 		$this->saved_cards          = 'yes' === $this->get_option( 'saved_cards' );