Make sure SL synctex controls remain the same.

services/web/public/stylesheets/app/editor/pdf.less

@@ -242,6 +242,8 @@
 		.btn;
 		.btn-default;
 		.btn-xs;
+		display: block;
+		margin-bottom: 3px;
 
 		> .synctex-control-icon {
 			display: inline-block;