Merged in feature/from-pantheon (pull request #16)

code from pantheon

* code from pantheon

wp/wp-content/plugins/wordpress-seo/src/conditionals/yoast-tools-page-conditional.php

@@ -0,0 +1,28 @@
+<?php // phpcs:ignore Yoast.Files.FileName.InvalidClassFileName -- Reason: this explicitly concerns the Yoast tools page.
+
+namespace Yoast\WP\SEO\Conditionals;
+
+/**
+ * Conditional that is only met when current page is the tools page.
+ */
+class Yoast_Tools_Page_Conditional implements Conditional {
+
+	/**
+	 * Returns whether or not this conditional is met.
+	 *
+	 * @return bool Whether or not the conditional is met.
+	 */
+	public function is_met() {
+		global $pagenow;
+
+		if ( $pagenow !== 'admin.php' ) {
+			return false;
+		}
+
+		if ( isset( $_GET['page'] ) && $_GET['page'] === 'wpseo_tools' ) {
+			return true;
+		}
+
+		return false;
+	}
+}