Fixed new "user config" console feature

- Replaced "DI::" call with constructor injection
- Added return value for IPConfig::load() and PreloadPConfig::load()

src/Core/PConfig/IPConfig.php

@@ -35,7 +35,7 @@ interface IPConfig
 	 * @param int $uid The user_id
 	 * @param string $cat The category of the configuration value
 	 *
-	 * @return void
+	 * @return array The loaded config array
 	 * @see Cache
 	 *
 	 */

src/Core/PConfig/PreloadPConfig.php

@@ -68,6 +68,8 @@ class PreloadPConfig extends BasePConfig
 
 		// load the whole category out of the DB into the cache
 		$this->configCache->load($uid, $config);
+
+		return $config;
 	}
 
 	/**