siteName array general config setting not working as expected

[ademers]

Description

Setting a siteName array in general.php does not work as documented at https://docs.craftcms.com/api/v3/craft-config-generalconfig.html#property-sitename

Steps to reproduce

1. In general.php add following config setting:

'siteName' => [
    'default' => 'Primary Site',
    'secondary' => 'Secondary Site',
],

2. Site Names in CP are not overwritten as expected.

The issue appears to be in sites.php line 1039:

cms/src/services/Sites.php

Lines 1039 to 1041 in ebfec3e

	if (is_array($generalConfig->siteName) && isset($generalConfig->siteUrl[$site->handle])) {
	$site->overrideName($generalConfig->siteUrl[$site->handle]);
	}

Additional info

• Craft version: Craft Pro 3.0.10.1
• PHP version: 7.0.29
• Database driver & version: MySQL 5.5.5
• Plugins & versions: https://cl.ly/0V130W1w2C2B