SQL error in ORDER BY clause in get_artefactchooser_artefacts (Bug #1416147)

Change-Id: I3b94130c605592ef22e1d5d30f038d3aafe1e03a
Signed-off-by: Yuliya Bozhko <yuliya.bozhko@totaralms.com>

htdocs/lib/view.php

@@ -3251,7 +3251,7 @@ class View {
                 }
 
                 if (empty($sortorder)) {
-                    $sortorder .= 'ORDER BY ';
+                    $sortorder .= ' ORDER BY ';
                 }
                 else {
                     $sortorder .= ', ';