Bug 457177 - Include messageId as URL property when creating event/task from email. r=mkmelin

Differential Revision: https://phabricator.services.mozilla.com/D112646

--HG--
extra : amend_source : fd2c230f61f1cd80f1435856d4d3f0205000efcd

calendar/base/content/calendar-dnd-listener.js

@@ -44,6 +44,7 @@ var calendarTaskButtonDNDObserver;
 
       aItem.calendar = getSelectedCalendar();
       aItem.title = aMsgHdr.mime2DecodedSubject;
+      aItem.setProperty("URL", `mid:${aMsgHdr.messageId}`);
 
       cal.dtz.setDefaultStartEndHour(aItem);
       cal.alarms.setDefaultValues(aItem);

calendar/base/content/calendar-extract.js

@@ -115,6 +115,7 @@ var calendarExtract = {
     item.title = message.mime2DecodedSubject;
     item.calendar = getSelectedCalendar();
     item.setProperty("DESCRIPTION", content);
+    item.setProperty("URL", `mid:${message.messageId}`);
     cal.dtz.setDefaultStartEndHour(item);
     cal.alarms.setDefaultValues(item);
     let sel = getMessagePaneBrowser().contentWindow.getSelection();