N°4621 Fix naming inconsistencies in sources/*

sources/Application/UI/Base/Layout/MultiColumn/MultiColumn.php

@@ -0,0 +1,45 @@
+<?php
+/**
+ * @copyright   Copyright (C) 2010-2021 Combodo SARL
+ * @license     http://opensource.org/licenses/AGPL-3.0
+ */
+
+namespace Combodo\iTop\Application\UI\Base\Layout\MultiColumn;
+
+
+use Combodo\iTop\Application\UI\Base\Layout\MultiColumn\Column\Column;
+use Combodo\iTop\Application\UI\Base\Layout\UIContentBlock;
+
+/**
+ * Class MultiColumn
+ *
+ * @package Combodo\iTop\Application\UI\Base\Layout\MultiColumn
+ * @internal
+ * @since   3.0.0
+ */
+class MultiColumn extends UIContentBlock
+{
+	// Overloaded constants
+	public const BLOCK_CODE = 'ibo-multi-column';
+	public const DEFAULT_HTML_TEMPLATE_REL_PATH = 'base/layouts/multi-column/layout';
+
+	/**
+	 * @inheritDoc
+	 */
+	public function __construct(?string $sId = null)
+	{
+		parent::__construct($sId);
+	}
+
+	/**
+	 * @param \Combodo\iTop\Application\UI\Base\Layout\MultiColumn\Column\Column $oColumn
+	 *
+	 * @return $this
+	 */
+	public function AddColumn(Column $oColumn)
+	{
+		$this->AddSubBlock($oColumn);
+
+		return $this;
+	}
+}