Use the FullCalendar widget instead of the embedded Google widget

[wilzbach]

See also:

• https://github.com/dlang/dlang.org/pull/2222#issuecomment-367156497
• https://fullcalendar.io/

FullCalendar allows a lot of customization and also comes with a few themes:

https://fullcalendar.io/js/fullcalendar-3.8.2/demos/themes.html

[dlang-bot]

Thanks for your pull request, @wilzbach!

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[wilzbach]

CC @CyberShadow - are you okay with this too? The only downside here is that a Google calendar API key needs to be exposed, but I restricted the domain to localhost, dlang.org and dlang.io which should make abuse harder. And if this ever becomes a problem we can easily revert back to the old widget.

[CyberShadow]

For some reason some of the CDNs used on this page and dlang.org are timing out for me. Is it just me?

[CyberShadow]

When it does load, the calendar I see is completely blank. I see some events currently on https://dlang.org/calendar , but here there's nothing.

[wilzbach]

Is it just me?

I think so. Does https://fullcalendar.io/js/fullcalendar-3.8.2/demos/themes.html work for you?

[CyberShadow]

Yep, that works fine.

[wilzbach]

Interesting it works fine in my Chrome and Firefox:

What error do you get in your Firefox?

[CyberShadow]

No error, it's just blank.