Implement ignored server block in conversations

- Add server ignore status in contact profile page
- Add new reason in DisplayNotFound exception page

src/DI.php

@@ -671,6 +671,15 @@ abstract class DI
 		return self::$dice->create(Security\Authentication::class);
 	}
 
+	//
+	// "User" namespace instances
+	//
+
+	public static function userGServer(): User\Settings\Repository\UserGServer
+	{
+		return self::$dice->create(User\Settings\Repository\UserGServer::class);
+	}
+
 	//
 	// "Util" namespace instances
 	//