WebUI: fix draw events for datatables

sometimes the context menu was not working because the draw action
was called too early

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

templates/webclient/files.html

@@ -840,11 +840,10 @@ explicit grant from the SFTPGo Team (support@sftpgo.com).
                     $('#file_manager_list_container').removeClass("d-none");
                     let api = $.fn.dataTable.Api(settings);
                     api.columns.adjust().draw("page");
-                    drawAction();
                 }
             });
 
-            dt.on('draw', drawAction);
+            dt.on('draw.dt', drawAction);
 
             function drawAction() {
                 //{{- if .CanAddFiles}}