Double click for dates

[coolcorey]

Is your feature request related to a problem? Please describe.
I noticed while using you fabulous lib that I would accidentally trigger day-was-clicked events when I was clicking outside the Event Dialog in order to close it. I wanted to capture the click event as a way to move to a new page that adds new events, but that is not my intent when clicking outside the Event Dialog, I am just trying to close it, and accidentally triggering a click event from Qalendar.

Describe the solution you'd like
I thought, for my purposes anyway, that a double click was a much more intentional way for a user to signal that they wanted to add an event, so I was proposing a config option that asks Qalendar only to notify me of double click events. I am submitting a crappy PR, but I just wanted to get your thoughts on the idea. I can do more work to the PR if you don't think its a terrible idea.

Additional context
None

Thanks for your lib!