It's been ready for a while, though we haven't bothered enabling it because the
calendar view is less than great, though I think it makes sense to enable it
now as experimental and improve it as we go.
Fixes#128.
I was initially trying to add it to the side menu. For a reason I just
can't understand the dialog wouldn't show from there, and I
unfortunately don't have time to debug it at the moment. Here it just
works as is "good enough" for now.
I was trying to make it easier for people, but on second thought, en-GB
is definitely not representative of Europe, so having this split was
confusing.