Bug 306692 'Open calendar file' does nothing. patch by robin.edrenius@gmail.com r=jminta

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

@@ -43,6 +43,9 @@ PrintPreviewWindowTitle=Print Preview of %1$S
 # The name of the calendar provided with the application by default
 homeCalendarName=Home
 
+# The name given to a calendar if an opened calendar has an empty filename
+untitledCalendarName=Untitled Calendar
+
 # Event status: Tentative, Confirmed, Cancelled
 # ToDo task status: NeedsAction, InProcess, Completed, Cancelled
 statusTentative  =Tentative