Use default theme in /articles

Signed-off-by: Christopher Guindon <chris.guindon@eclipse-foundation.org>

_projectCommon.php

diff --git a/_projectCommon.php b/_projectCommon.php
index e2ce354..5528bca 100644
--- a/_projectCommon.php
+++ b/_projectCommon.php
@@ -1,14 +1,25 @@
 <?php
+/**
+ * Copyright (c) 2014, 2018 Eclipse Foundation and others.
+ *
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * Contributors:
+ *    Christopher Guindon (Eclipse Foundation) - initial API and implementation
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
 
-	# Set the theme for your project's web pages.
-	# See the Committer Tools "How Do I" for list of themes
-	# https://dev.eclipse.org/committers/
-	$theme = "solstice";
-  $App->setOutDated('2014-03-01');
-	# Define your project-wide Nav bars here.
-	# Format is Link text, link URL (can be http://www.someothersite.com/), target (_self, _blank), level (1, 2 or 3)
-	$Nav->addNavSeparator("Articles", "index.php");
-	$Nav->addCustomNav("Contributing", "contributing.php", "_self", 1);
-	$Nav->addCustomNav("Suggest a new article", "https://bugs.eclipse.org/bugs/enter_bug.cgi?product=Community&component=Articles", "_self", 1);
+// Set the theme for your project's web pages.
+// See the Committer Tools "How Do I" for list of themes
+// https://dev.eclipse.org/committers/
+$theme = NULL;
+$App->setOutDated('2014-03-01');
 
-?>
+// Define your project-wide Nav bars here.
+// Format is Link text, link URL (can be http://www.someothersite.com/), target (_self, _blank), level (1, 2 or 3)
+$Nav->addNavSeparator("Articles", "index.php");
+$Nav->addCustomNav("Contributing", "contributing.php", "_self", 1);
+$Nav->addCustomNav("Suggest a new article", "https://bugs.eclipse.org/bugs/enter_bug.cgi?product=Community&component=Articles", "_self", 1);
\ No newline at end of file