Option to hide empty calendars

[alexbergsland]

I have several calendars configured differently and some of them might sometimes not show anything. But instead of being hidden they display "No upcoming events" or whatever the English translation is of "Inga kommande händelser."
I normally use hideEmptyDays: true but I also tried displayBlankDays: true from #29 but that only affects days and not calendars.

{
        module: "MMM-CalendarWeek",
        position: "top_left", 
        config: {
                colored: true,
                calendarTitle: "Viktigt",
                maximumNumberOfDays: "10",
                displayLocation: true,
                showEndDate: true,
                maximumDaysPerLine: "1",
                maximumEntries: "3",
                hideEmptyDays: true,
                calendars: [
                        {
                                symbol: "calendar",
                                url: "https://calendar.google.com/calendar/basic.ics",
                                color: '#72b8ff'
                       }
                ]
        }
},

This shows three calendars and the second one (from the config above) is empty except from "Inga kommande händelser." in grey.