[4.0] Fix template preview (#36268)

* Fix template preview

* Fix template preview

Author: Fedik

libraries/src/Helper/ModuleHelper.php

@@ -84,12 +84,10 @@ public static function &getModule($name, $title = null)
 	public static function &getModules($position)
 	{
 		$position = strtolower($position);
-		$result = array();
-		$input  = Factory::getApplication()->input;
-
-		$modules =& static::load();
-
-		$total = \count($modules);
+		$result   = array();
+		$input    = Factory::getApplication()->input;
+		$modules  = &static::load();
+		$total    = \count($modules);
 
 		for ($i = 0; $i < $total; $i++)
 		{
@@ -99,14 +97,16 @@ public static function &getModules($position)
 			}
 		}
 
-		if (\count($result) === 0)
+		// Prepend a dummy module for template preview
+		if ($input->getBool('tp') && ComponentHelper::getParams('com_templates')->get('template_positions_display'))
 		{
-			if ($input->getBool('tp') && ComponentHelper::getParams('com_templates')->get('template_positions_display'))
-			{
-				$result[0] = static::createDummyModule();
-				$result[0]->title = $position;
-				$result[0]->position = $position;
-			}
+			$dummy = static::createDummyModule();
+			$dummy->title = $position;
+			$dummy->position = $position;
+			$dummy->content = $position;
+			$dummy->contentRendered = true;
+
+			array_unshift($result, $dummy);
 		}
 
 		return $result;