Fix bug 719789 - The appointment mouseover should show the organizer. r=philipp

--HG--
extra : rebase_source : c7d00738c821c602d0e6142bbcd2fc361045624e

calendar/locales/en-US/chrome/calendar/calendar.properties

@@ -173,6 +173,8 @@ tooltipDate=Date:
 tooltipCalName=Calendar Name:
 # event status: tentative, confirmed, cancelled
 tooltipStatus=Status:
+# event organizer
+tooltipOrganizer=Organizer:
 # task/todo fields
 # start date time, due date time, task priority number, completed date time
 tooltipStart=Start:

calendar/resources/content/mouseoverPreviews.js

@@ -236,6 +236,11 @@ function getPreviewForEvent( aEvent) {
       boxAppendLabeledText(vbox, "tooltipStatus", statusString);
     }
 
+    if (event.organizer && event.getAttendees({}).length > 0) {
+      let organizer = event.organizer;
+      boxAppendLabeledText(vbox, "tooltipOrganizer", organizer);
+    }
+
     var description = event.getProperty("DESCRIPTION");
     if (description) {
       boxAppendBodySeparator(vbox);