Index: lams_gradebook/web/includes/css/gradebook.css
===================================================================
diff -u -rcf49a1fdafe6a2eee9f39ea840b5d6325fa1d82d -r723b5bcbdf0db6b9a4fbeacdc55f7336992ac935
--- lams_gradebook/web/includes/css/gradebook.css	(.../gradebook.css)	(revision cf49a1fdafe6a2eee9f39ea840b5d6325fa1d82d)
+++ lams_gradebook/web/includes/css/gradebook.css	(.../gradebook.css)	(revision 723b5bcbdf0db6b9a4fbeacdc55f7336992ac935)
@@ -3,12 +3,12 @@
 }
 
 #export-selected-lessons-button {
-	margin-left: 295px;
 	margin-bottom: 10px;
 }
 
 #gbox_lessons-jqgrid {
-	margin: 10px 5px;
+	margin-left: auto;
+	margin-right: auto;
 }
 
 .ui-widget-content {