Merge branch 'develop-ascraeus' into develop

phpBB/phpbb/template/twig/twig.php

@@ -158,6 +158,10 @@ class twig extends \phpbb\template\base
 		}
 
 		$names = $this->get_user_style();
+		// Add 'all' folder to $names array
+		//	It allows extensions to load a template file from 'all' folder,
+		//	if a style doesn't include it.
+		$names[] = 'all';
 
 		$paths = array();
 		foreach ($style_directories as $directory)