Do not try to save a draft in alternative editors

lib/scripts/edit.js

@@ -420,7 +420,7 @@ var locktimer = new locktimer_class();
         // refresh every minute only
         if(now.getTime() - locktimer.lasttime.getTime() > 30*1000){ //FIXME decide on time
             var params = 'call=lock&id='+encodeURIComponent(locktimer.pageid);
-            if(locktimer.draft){
+            if(locktimer.draft && dwform.elements.wikitext){
                 var dwform = $('dw__editform');
                 params += '&prefix='+encodeURIComponent(dwform.elements.prefix.value);
                 params += '&wikitext='+encodeURIComponent(dwform.elements.wikitext.value);