Open the calendar app when a day cell is clicked

[frankiesardo]

I haven't add a selector on the cells because of the custom background. I see that everywhere else the system selector is used so it will feel weird overriding the colour just for the cells. Something more subtle like drawing a circle around the day would probably be a better selector than changing the background.

[frankiesardo]

Turns out it wasn't too difficult to add the circled state I had in mind. What do you think about it?

[mr-archano]

Nice one @frankiesardo! :+1:

[tasomaniac]

Why does this PR include 2 things? I think you should separate the circle feature in another PR.

[frankiesardo]

Like this is ever gonna be merged...

[tasomaniac]

Good point :)